i have a Zulu-Lulu pair in a 29 gallon tank with 15 gallon refugium, and a hob filter that has been up and running for 4 mos, several corals in the tank (open brain, xenia, sea fans, zoos , ricordia , and a large sponge). Fish in tank are a clown goby, and 2 curious worm blennies. The seahorses...