I have been trying to remove the hairy algae in my tank. I have been able to remove most of it by water changes, turning off all lighting and covering the tank w/black bags to avoid light getting in, for a few days. But, I still have some hairy algae. So, since hawkfish won't allow cleaner shrimp, snails into the tank, can blenny's survive with hawkfish? I have two hawkfish in my tank and didn't realize that they would prey on my cleaner crew, as they have.