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#500480 - 01/08/19 08:11 PM Algae and water chemistry
Madelyn Offline

Registered: 01/08/19
Posts: 3
Loc: Michigan
Hi Everybody,

My name is Madelyn and I am the owner of a 1/2 acre pond in Michigan. The pond is about 30 years old. We are doing our best to slow eutriphocation (need spell check) smile. We have just some minnows, bluegill and a few bass. This last summer we created a sandy beach on one end.

This summer I also pumped into the pond a lot of water from the nearby stream. Pond is not connected to any water bodies or streams. I think I messed up the water chemistry as now we have a bright green carpet of whatever all over the bottom of the pond frown. This has never happened before and we don't usually have much algae except chara. How can I fix this and stop it from happening again? Our water is usually pretty clear. Thanks for any help.

#500483 - 01/08/19 08:52 PM Re: Algae and water chemistry [Re: Madelyn]
Snipe Online   content

Registered: 10/26/18
Posts: 209
Loc: NW Kansas
Welcome Madelyn! You've found a great place here for your question, and someone with much more experience than I will speak on this, I'm sure. Some great folks here when it comes to water quality/Chemistry!!
I Subscribe!

#500484 - 01/08/19 09:12 PM Re: Algae and water chemistry [Re: Madelyn]
Bill Cody Offline
Field Correspondent


Registered: 04/18/02
Posts: 12734
Loc: Northwest Ohio - Malinta OH
Is your new green bottom carpet just new Chara growth? Or is the green growing on top of the Chara? Is the water still clear? Can you collect some of the green and get a close clear picture of it. Maybe put some of it in water of a cool-whip lid for the picture?

If it is filamentous algae then the water from the stream likely contained lots of nitrogen to stimulate filamentous algae now growing on top of Chara.

How soon after you pumped stream water did the green develop?

Edited by Bill Cody (01/08/19 09:14 PM)
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#500539 - 01/10/19 10:10 PM Re: Algae and water chemistry [Re: Bill Cody]
Madelyn Offline

Registered: 01/08/19
Posts: 3
Loc: Michigan
Thanks for your help. It is new green carpet on the bottom and on the chara. Showed up after I added the stream water. :{ Yup, I think you are right about the water. The algae is bright green and breaks up if I try to rake it.

#500546 - 01/11/19 10:13 AM Re: Algae and water chemistry [Re: Madelyn]
Mike Whatley Offline

Registered: 04/22/18
Posts: 698
Loc: Louisiana
Sure sounds like FA!!
.10 surface acre pond, 10.5 foot deep. SW LA. The epidomy of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, FHM, Longear Sunfish, Gambusia and apparently, now crappie.....I subscribe!!

#500567 - 01/12/19 09:55 AM Re: Algae and water chemistry [Re: Madelyn]
ewest Offline
Hall of Fame 2014


Registered: 03/08/05
Posts: 19744
Loc: Miss.
Look at this thread from the archives with pics and see if it looks similar.


#500578 - 01/12/19 02:34 PM Re: Algae and water chemistry [Re: ewest]
Madelyn Offline

Registered: 01/08/19
Posts: 3
Loc: Michigan
We've had filamentatious algae around edges occasionally which I rake out, but this stuff carpets the bottom like green velvet. If I use some green clean pro, cutrine or even hydrothol? I hope it will die and surface so I can rake it up.


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