So string algae has decided to take residence in my pond. I decided to take a scotch brite pad and just knock the majority of it off. A couple of swipes and I noticed the fish were going crazy. Usually they hide when they see me. I took a look at the pad and it had a couple small red worms on it. I learned these are small bloodworms and the fish absolutely love them. So cool now I cant wait for the algae to grow back.