Loretta, I have made applications of phoslock to my pond and have had good results. First , have your water tested for free reactive phosphorus, not just total P. Note: it can be difficult to find a lab that can do this. Phoslock requires constant agitation to distribute evenly. Your aeration system will aid in mixing once it's applied. I applied 1/2 of the phoslock and then tested the water before adding the second half. You really don't want to eliminate all P. The bottom of the food chain needs some to thrive. Alum/hydrated lime was effective also but was costly also because it took a special spray boat to apply. Identifying and reducing or eliminating the source of your P load should be considered to avoid future applications. The folks at seapro have been very helpful through this learning experience and were honest about what it can and can't do. I also manually remove primrose from my water so there is no recycling of those nutrients.
Note: I am no pond pro. I also have no bias for one product over another. They both work but I can apply the phoslock myself.
