Well, I decided to set up a 38 gallon aquarium for my son. He want to make it a reef aquarium with a pair of true percula clown fish and dwarf seahorses. I plan on setting up a 10 gallon sump, under-gravel filter, and a 404 fluval external canister filter. Basically, my question is: How many dwarf seahorses can he keep in his aquarium? I read that they are about 1.5 inches when they are fully mature, and they like to live in herds.
Thanks in advance.
Thanks in advance.