I just discovered a product that is an enzyme and bacteria product.you can brew the product with a quart of the product a quart of molasses and four and a half gallons of water. You can keep brewing the product with what you make.so the price is very reasonable.I have started to treat my pond and I have placed some measuring sticks in the muck and it appears to be digesting some of the muck.I haven't been able to get any aeration setup yet.