I have a 1/3 acre pond not more than 8 feet deep in central Ohio. It's about 4 years old. Stocked with YP,SMB,RE,GS,FH.
The pond is really pretty w/ very nice clear water November - mid-April. However during the warm months I have less than 6" of vis. Sort of like a chalky light brown. I do a regular application of EccoBoost prx which has dramatically reduced the FA, I have purposely planted emergent plants and I run two bottom diffusers.
I suspect the color is somewhat impacted by the fact that my kids swim in the pond occasionally during warm months, but we're going on more than 2 weeks since they've in it and the clarity is still as if they just finished. I understand that mechanical mixing is going to cause dirty water but it seems like once it gets dirty it remains so until the water temps drop in late fall. Is there any way to make the dirt fall out of the water column faster? Would a dose of Alum help with this? Should I do chemistry test on my water?
It's been a couple of years but I did a jar test and don't really remember the results other than at some point I put a little Alum in one of the jars and it immediately cleared.
If kids stir up silt, it will settle relatively quickly. If the kids stir up clay particles with electrical charges, that can stay suspended for a LONG time.
Here is a link where I give some instructions for a jar test.
If you scroll down a little farther, you will see where esshup gives some links on what to do after you get the results of your jar test.
I wonder if the aerators are not allowing the dirt to settle or settle fast enough since it only occurs in the warmer months after the kids stir it up.
I've wondered this too given that about the time I turn the aerators on my water becomes murky. Can you aerate a pond too much to the point of over circulating the water into a mud soup?
If kids stir up silt, it will settle relatively quickly. If the kids stir up clay particles with electrical charges, that can stay suspended for a LONG time.
Here is a link where I give some instructions for a jar test.
If you scroll down a little farther, you will see where esshup gives some links on what to do after you get the results of your jar test.
I started the jar test last night. I'm surprised at how the water is more 'chalky/milking' than 'dirty'. I guess we'll see what settles out over the next several days.
24 hours into the jar test and nearly all particles have settled. At 48 hours the water is nearly as clear as drinking water w some sediment on the bottom of the jar. So I apparently don’t have a clay turbidity problem. I can only assume I have a mechanical mixing problem.
I was prepared to dose with Alum, but now maybe not needed!
After 24 hours and hedging my bet that this was a mechanical issue, I turned my aeration off. I had less than 6” on a sechi. Now 48 hours later I have close to 10” on the sechi, so I have to assume this chalky water is the result of over mixing (is that a thing) from my Vertex aerator of my pond water. I turned aeration back on due to high water temps and inbound rain. Best I can tell is that my pond is being completely turned 5-6 times in a 24 hour period. I turned one of my air stations off which should reduce the turnover to around 3x and I’ll monitor clarity over the next few days.
I’m also considering running aeration w two stations but for only 4-6 hours per day to get aabout an 2x turnover every 24 hours.
Does anyone have experience with this that might shorten my learning curve?
Picture is both jars. One on left was in complete dark at 24 hours.
I think the first time I did an unofficial jar test it took my water approx a week to clear up sitting in the garage on a shelf. The first time I tested it with Alum it was clear in about 15mins. I haven't moved any further than that though. I was just about to pull the trigger on applications and for whatever reason the water cleared up and has been 12-24" visible on the secchi disk ever since (very strange).
Curious, how much water clarity are you looking to get out of the pond?
I think the first time I did an unofficial jar test it took my water approx a week to clear up sitting in the garage on a shelf. The first time I tested it with Alum it was clear in about 15mins. I haven't moved any further than that though. I was just about to pull the trigger on applications and for whatever reason the water cleared up and has been 12-24" visible on the secchi disk ever since (very strange).
Curious, how much water clarity are you looking to get out of the pond?