Often there is a limiting factor to pond fertility. Many times it is not the lack of N,P, K - common in fertilizer. Often it is lack of alkalinity and sometimes there are other limiting factors (not including fertilizer). The reason I note this is your water can be fully fertile (not needing fertilizer) and when the limiting factor is removed the pond will bloom. This can be for example the adding of lime. The danger is adding to much fertilizer when not needed and when the limiting factor is removed the pond goes fertile crazy leading to a DO crash. Water tests and soil tests are a good idea so you will know the status of the pond first including the limiting factor.

Last edited by ewest; 05/14/21 10:53 AM.