Mike is definitely onto something. Phytoremediation is highly effective and through bio degradation won't turn wetlands into an EPA superfund site unless you are capturing heavy metals or PCB's.
I would think your next biggest water quality issue is the high protein pellets used to feed fish. Hypothetically, if you are feeding fish at a rate of 2.5% of body weight, increasing the rate to 2.8% would increase the organic nitrogen load in your pond sediment by 20%.
Like most pets, people tend to overfeed them and I doubt pet fish are any different.
I can honestly say what I feed in pellets and Black Soldier Fly Larvae Meal is miniscule compared to what most are feeding. Every pellet is gone in 5 minutes. I try not to feed too heavily so they larger fish will still play their part as predators on the fry and YOY.
After sleeping on my thoughts of wind aeration (and my lack of it), today I installed a 4/10hp waterfall pump with a PVC nozzle to add some surface agitation during the day. The pump is pulling water from about 2' deep off the dock. My hopes are that I'll only be circulating surface water and not adding any heat to depth.
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https://photos.app.goo.gl/1byyEa86F92U1B7fA[/img]
After less than a hour, all that scum has been pushed to the far side of the pond.
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https://photos.app.goo.gl/9ZiJumd77UFmAkQm6[/img]
