I have a three month old 40 gallon breeder with 3 blue legged crabs, 2 emerald crabs, and 9 snails (cereth, I think). no fish yet. I would like to increase the size of my crew because the algae is growing too quickly. Nitrites are zero and nitrates are about the same. I'm getting bubble algae and lots of furry growth on the coral. Lights are on about 10 hours/day. Any advice?