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PerryNZ Offline OP
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There are two grey female Muscovies remaining. The rest went back to where they came from. There were simply too many of them to be sustainable within the area we have. However, history may be about to repeat itself . . .

Trevor the (female) Mallard is being followed around by eleven ducklings - being Pekin/Mallard crosses. The Khaki Campbell had ten, but is now down to nine, after I found one dead, floating in the pond.

There does seem to often be some unpleasant inter-generational aggression involving the ducklings. Given there's no food shortage, it seems quite needless. The dead duckling may have been a casualty of that squabbling.

Lucy tried incubating some infertile eggs, until I took pity on her and removed them.

We launched the dinghy a week ago, to pull up the pump and clear the screen. The flow of water through the flowforms has improved, markedly. As has the reduced turbidity from fewer Muscovies.

Summer is upon us and there is all the usual seasonal chores. The main one is replacing batteries and re-programming everything to do with irrigation. Just when I thought that I had the irrigation more or less under control . . . I looked out the carport door this morning to see a gusher atop the shed.

A 19mm aerial irrigation pipe had ruptured. So I turned that off and set about the repair. It's what's called thinwall or lateral pipe, made from alkathene. A section of around three feet long was brittle. I found that out as I sought to cut a neat end in the pipe to put in a joiner, only to see it split, shatter or crack, with each cut. By the time I'd cut back four inch sections until I'd got out of the brittle part, I needed a three foot length of replacement pipe and two joiners.

Well, the timers and automation part seem O.K. so far anyway . . . (fingers crossed)

The pond is still getting a top up for an hour, as part of the daily irrigation cycle. Probably around 3,000 gallons - maybe 3,500.

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PerryNZ Offline OP
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Originally Posted By: PerryNZ
The various Internet sources I consulted were right. Almost a total (watermeal) takeover in a matter of days. The very hot, unusually humid weather was probably a big help.

Not sure how worried I should be. The flowforms should be looking after the aeration and the watermeal cover may even help the water temperature remain lower than usual.

Well it was early 2018 when I made that post, with the accompanying pix. It's now June 2019 and a lot has changed.

1) A week ago, I captured and removed to a local wildlife sanctuary, over 25 ducks. There are four amphibious avians left.
* Trevor the [female] mallard
* Two ugly-but-cute Muscovy females
* Lucy the rescue goose.

With luck, that should arrest any further population explosions.

2) The continuing pond bank damage and my sanity made that re-location essential. But something else happened at approx. the same time. The dense, total water surface cover of watermeal and duckweed has gone. Happened in about a week. I've no idea why - but I'm not complaining.

In the next day or two, I'll take some pix and present them here for all to see.

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No idea why on the plants


It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP
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PerryNZ Offline OP
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To refresh your memory, back in an earlier post I had this image:

The total coverage of the watermeal coverage is obvious. That pic was taken in early Spring.

Much later, (over a year), in early winter, taken from approximately the same point . . .


It was a windy day and the small amount of duckweed and watermeal remaining is at the same windward end of the pond as the photographer.

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PerryNZ Offline OP
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I went away for 43 days and lowered the daily pond fill rate for that period. Being winter, I thought it might rain a lot. It didn't. After now being back and 2 weeks of longer daily pumping, the water level is getting close to what it was before I left.

I've been around some parts of the edges with assorted butressing that enabled me to reclaim / rebuild edges which the ducks had severely eroded. It will take a while to get all the way round the parts of the edge which need repairs, as I need grass roots to grow and bind the edge fill so it won't collapse, before I move the butressing to the next position.

Water
It's certainly been a kaleidoscope of experiences. Cloudy water; clear water; pond scum total coverage; pond weed total coverage and now slightly cloudy and green-hued water. Like the other experiences, perhaps it's just a matter of waiting and seeing what happens. Sometimes, I wonder if changes in water depth produce observable changes in water 'quality.'

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Perry, same thing has happened to me. I assume that less water is available to handle the nutrient load.


It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP
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PerryNZ Offline OP
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The pond is - of course - a closed body of water, with fairly nutrient-rich supernatatant being added daily from our waste water bio-digester. The grass-eating, in-pond-pooping ducks will be adding a very small amount, too. I imagine seepage losses are probably equal to the inputs, but that's a guess.

I could get some water testing done, but what use would that be? Beyond telling me the 'state' of the water. It's not a swimming pool! I can't imagine what I could do to change any aspect of the water's dissolved salts / other components, realistically.

For the time being, a keep waiting and watching stance seems akin to a masterly policy of inactivity, to me. wink

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The water seems to be getting greener. And, in the slow 'evolution' of the pond ecology, pond scum is returning. To me, it does not appear the same - close-up - as any previous incarnations.

The pic of the scum is deceptive. The greenness of the water obscures the greenness of the scum. And is it scum? A collated patch of bubbles? I wonder if it will cover the whole pond surface?


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PerryNZ Offline OP
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Strange - I'd Forgotten

Overnight, we had a brief period of fairly heavy rain. Not a downpour, nor a sprinkle. After rubbing the sleep out of my eyes, I peered out the bedroom window in the morning to see a pond with its surface clear. Huh?

Then I remembered a previous occasion. Rain seems to obliterate certain pond scum incidences. Certainly the ones which depend on clusters of bubbles. Later, when I looked more closely, the only remaining vestiges were under overhanging trees, where the bubble-scum would dodge rain drops arriving from the sky at terminal velocity.

Tis a weird pond world.

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PerryNZ Offline OP
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I got down on my knees the other day and groped under the pond edge. Sure enough, the mallard et al are pecking (billing?) in under the bank edge. I could slide my fingers in a couple of inches where the undermining was happening.

Seems that I'll need to consider a solid pond edge / margin, in the form of bricks or paving slabs / stones or re-cycled bits of broken concrete or the like. If I don't do something, the pond will get bigger than I want it to, as the undermined bank collapses downwards on itself, from time-to-time.

I wondered if - like hens - ducks need grit for their crops, so 'mining' for grit and stones from the pond edge is a sort-of natural phenomenon.

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Without ceremony, the floating island was launched, today.


November 2019 and the duckweed returned with the advent of summer. And how! 24 November saw the launch of the floating island, the plants of which are intended to be nutrient strippers, to help clear the water, as well as be decorative.

Pond Pickerel (pontederia cordata) should give some lovely spikes of blue flowers, later in the season. Around the edges, the other plant (sweetflag), did not like being out of the water that long. It was two weeks from building the floating island to launching it in the pond.

The framework is a discarded plastic pallet. Floatation courtesy of eight soft drink bottles. Old wire netting, doubled, stops the growing media from falling out. Eventually - I hope - the roots of the plants will bind the bark chips together. The scraps of netting on the top are to stop the ducks digging.

Last edited by PerryNZ; 11/23/19 06:12 PM.
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Interesting idea Perry. Please post update photos as your summer goes along and the plants fill in the island! smile


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Will do. Long view . . .

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Looks very serene. Did you anchor the island or are you going to let it drift around?


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My plan is to anchor it, with a (say) five foot long cord. The reason being I want it to swing with the wind, so the plant roots don't establish a grip on the pond bottom.

Today's launch was a sort-of concept test. (I had hoped it would float, rather than sink.) As I but dimly understand it, once the acorous and pontederia roots tie the bark chips together, their root mass will generate some gas that will co-generate buoyancy. If that happens, then I may be able to remove some of the PET soft drink bottle floats.

I may be persuaded to construct another floating island. Consequently, I'm wide open to suggestions for good nutrient-stripping water plant varieties, that can cope with ducks and are available in New Zealand.

By-the-by, I have heard a frog croaking away, in the last few weeks. Last time I heard that was back in 2017. It's always a source of wonder and perplexity to me as to how Nature 'seeds' things. Last I knew, neither tadpoles nor frogs had wings. wink

Recall that, "Nature finds a way" remark by Sam Neill in Jurassic Park?

Those two fly-in-invaders and 'seeding'' mallards being yet another example.

Last edited by PerryNZ; 11/23/19 09:33 PM.
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Well, the pontederia has thickened. One even separated in some way and seems to be starting its own little island. (In the circle, top right, in the first pic) The acorus seems to have all perished. Also, if the information was indeed correct, the island is not generating much root mass buoyancy gas. It used to have half to a quarter of an inch freeboard. Not now!
[Linked Image from spillerfamily.info]

The duckeed and wolfia is almost thick enough to walk on. That seems to be enough for the breakway piece of pontederia to start its own island. After it first 'broke off,' it lay on the surface, horizontally, for quite some time. I shall be watching with some interest. Especially as winter temperatures seems to thin the surface weed mat.
[Linked Image from spillerfamily.info]

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The acorous all seemed to perish and the breakaway island seems to have vanished. I have the notion that the pontederia is deciduous, so the floating island looks somewhat 'winter-chewed,' compared to the pic, back in this post. Maybe the 'pup' island will reappear once the warmer weather returns?

The most noteworthy thing of the moment is that the pond seems to be slowly - and noticeably - sealing itself. My guesstimate of the points of greatest leakage were the banks of the pond and the island, as the ducks had kept pecking (billing?) at those places. Perhaps seeking crop grit? Anyways, I've been constantly (and automatically) pumping water into the pond on a daily basis, although I have changed the length of time, depending on the season.

I'm used to seeing the level rise a little each a'noon and drop a little over the following 24 hours. But just in the last week, the amount of drop has slowed, markedly. A welcome trend!

No sign of the weedmat abating this winter, unfortunately.

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PerryNZ Offline OP
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I've been mulling over the weed-mat problem. Unlike last year, it did not diminish at all, over this past winter in New Zealand and the water is smelling quite anaerobic, despite the flowforms' aeration. What to do . . .?

More for floating debris than watermeal or duckweed, over in this thread, Busarider29 mentions a surface skimmer requirement.

After casting about the Interwebz, I came across this site. It was hard work wading through the oil, but some good came of the effort. Eventually, I got to this page, which made me a little more optimistic.

This video was impressive.


As the prices are eye-wateringly expensive, I searched the pondboss forums, but could not find any forumite mentioning experience with floating weed control using this commercial item.

I sent an email to the company, asking for details rather than sales fluff, puff and bluster, but it seemed to reach someone whose written comprehension ability was limited. (Being polite, there.) 90% plus of the reply was exactly what I'd asked not to be sent. Doh!

From amidst all the blurb, I did glean one important item. The purchase price was $NZ6,092.07. Plus freight; plus pump; plus hose; plus whatever is used to retain the weed but allow the water to return to the pond.

Bejabbers!

Last edited by PerryNZ; 08/22/20 02:14 AM.
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At those prices, I would probably drag my pond out in the road and chunk rocks at it.


It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP
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Dave Im not sure that would be very effective or practical


Im going to ask a lot of questions, but only because I'm clueless


5-20 Acres in Florida. Bass/Tilapia/Bowfin/Gator
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PerryNZ Offline OP
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I have made a little progress.

Proskim - at least in one video - show the whole process.

This page shows the whole kit. Although the price is much the same, at least it's all-inclusive, aside from the shipping to NZ cost. For the other option I mentioned earlier, the price was just for the floating skimmer part.

The apparent depth of the floating skimmer could be a concern. My pond is only knee deep.

One other potential problem is there are two screens: one for watermeal and one for duckweed. I have both weeds!

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PerryNZ Offline OP
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I wonder if anyone following this tale lives in the right area of Connecticut?

I've tried phoning several times (in the a'noon - Connecticut time).

To call Proskim, I dial 00-1-203-6722258. I'm getting the ringing tone, but get no answer. No answer phone response, either.

Perhaps they're suffering from covid-19 'fallout?'

Gooble maps indicate a private residence, (27 Coachman Drive, Branford, Connecticut 06405), but how reliable that is, I know not. No big pond, 'out-the-back,' according to the satellite view.

Ahhhh, well - I'll keep trying.

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PerryNZ Offline OP
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I see that it was June 2011 that I first wandered into these hallowed precincts, wondering if madness had seized me - with the desire for a pond. I haven't been taken away yet; and neither has the pond.

The floating island is still floating - surprisingly, considering the plant mass atop it. Note the arrow in the upper right. It's reason for being will be clearer later in this post.
[Linked Image from spillerfamily.info]

[Linked Image from spillerfamily.info]

[Linked Image from spillerfamily.info]

The now constant-for-two-years watermeal and duckweed cover means the water has become a little anaerobic and it's beginning to smell that way, too. So . . .

My 2021 New Year resolution is to bite the bullet and buy that pond surface skimmer that I mentioned, back in this post.

The stark reality is being past the point of no return, so-to-speak. I.e. What's the point of getting this far, to be cheated of full enjoyment by some weed?

Trevor has done her thing - again - and is raising nine little tykes. She brings them over to the house for some kibbled maize, several times a day.

[Linked Image from spillerfamily.info]

Seems that (because I host it, personally) I can't add the video in here, but this is the link to it.


Important if last - I hope all you USA-based pond aficionados have survived. Physically and financially. New Zealand has fared well, but not quite to the extent of the rosy pictures that are portrayed in some o'seas media. My wider area (two provinces - NZ is about the size of Colorado) has had no new cases since 28 April 2020. Some of the main centre cities have not fared quite so well, but many of the new cases being reported are already in (or associated with) managed quarantine facilities.

The economic impact has been cushioned by massive amounts of government borrowings (using govt. bonds) and that has kept the country afloat, financially, for now. Tourism was one of NZ's biggest foreign currency earners and employers. It is only a few steps from complete ruin, as in-bound flights bringing international tourists have been (and still are) banned.

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Beautiful pics, Perry! Love the floating island and Trevor's family.

You must have a lot fewer predators than we do here in the US. Dogs, cats, coyotes, opossums, raccoons, wild pigs, etc, etc, would make raising a duck family on shore a perilous & probably futile endeavor.

One thing that's become clear about the Wu flu in Europe and the US is that economic lockdowns don't work over the long haul. Neither do mask mandates. The vaccines are our best shot (if you'll pardon the pun), since we cannot isolate ourselves the way NZ and Taiwan have done so successfully.

Can't speak for anybody else on PB, but our little pond place in the woods of east Texas was a true blessing, a refuge in time of panic. Always something to do, or at least something to watch with all the life, aquatic and otherwise!

Last edited by anthropic; 01/02/21 09:27 PM.

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Originally Posted by anthropic
You must have a lot fewer predators than we do here in the US. Dogs, cats, coyotes, opossums, raccoons, wild pigs, etc, etc, would make raising a duck family on shore a perilous & probably futile endeavour.
We don't have raccoons or coyotes in NZ. The rest of your list: yes. Rats, mustelids* and hawks are predators here, but Trevor keeps her eye on the sky and I have plenty of cover (tree canopy). I have many rat bait stations around, too, plus one ferret trap.
Originally Posted by anthropic
Can't speak for everybody else on PB, but our little pond place in the woods of east Texas was a true blessing, a refuge in time of panic.
Sounds like a multi-faceted sanctuary.

Do tell an ignoramus from far away: what are the hieroglyphics in your signature? confused

* Ferrets, stoats, weasels.

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