Hello, I have a Fluval Evo 13.5 that has been set up since early October of last year. It has had a big algae problem since the beginning and I’ve had different inverts during this time. Currently, I have a tuxedo urchin and three electric blue hermit crabs. The urchin is pretty small but there is still some hair algae that isn’t being eaten. What other inverts could I add? Maybe an emerald crab or a turbo snail? I’ve had bad experiences with snails but I’ll be getting a big nassarius snail once I put fish in the tank.