Pond Boss Forums GENERAL QUESTIONS Muddy water old pond just turned muddy

While plankton is the building block of the food chain, you can have too much of a good thing. The plankton bloom is about right if you can see a white disc (top of a white 5 gallon bucket) that is 18"-36" below the surface in direct sun.

Less than that and it will allow light that might grow too many submerged plants. Less than that, and if all the algae dies off it might create a fish kill due to low O2 levels.

Green Clean Plus or Phycomiacin (sp?) will do it. Cutrine Plus is a copper based algacide that'd work too. Copper Sulphate will build up in the sediment over time. Trout don't do well with copper based algacides.