Howdy aaron7405 ! What is in your tank? flake phyto is not even close to the real thing - live phytoplankton integrates with the water column whereas flakes are broken down to excess nutrients of dead plankton. And if Bill is correct, flake plankton is not a natural part of the chain. I would monitor when you use it, watch what it does- if it starts collecting on the bottom I would stop. T