I have a 30 gallon tank. Started with live sand and a few pieces of live rock. Waited a month and had water tested and it was good. Started with 2 clown fish and being that I was already getting algae growth on the sand I also put a yellow head goby in at the same time. Did the cup method of acclimating them and the went into the water and now stick together in the same place in the tank. Feed them a mix of brine and mysis shrimp, they don' like pellets. All three are doing great after 2 weeks. Red algae starting to grow on glass. Need something that will eat that but I'm planning on getting a valentini puffer and I know they like to eat snails. Any suggestions? Thank you.