Interesting comment on grass carp. They wouldn't touch my algae....so I went with Tilapia. Far and away more cost effective than Cutrine plus or any other chemical, plus they provide tremendous forage for your bass. For the price of one bag of the granular Cutrine, I can buy Tilapia that will provide season long protection against algae, great eating, and unbelievable forage. Seems like a no-brainer to me.