I have a 120 gallon saltwater setup with live rock, two ocellaris clowns, roughly 6 itty bitty brand new hermit crabs, 5 turbo snails, 3 astrias, 2-3 ceriths, and 2 emerald crabs. I have a nitrate problem that weekly water changes do not seem to help and I do maintenance on the tank every day. The clowns are new, so I haven't even fed them in the tank yet other than the pellets I had to scoop out because I don't think they like them. The tank is cycled and nitrites are 0, pH is 8, temp is 78, but nitrates and phosphates are high and no amount of water changes seem to help. Life is booming inside, though. We see tonss of small brittle stars and bristle worms, along with another kind of star I'm unsure about and some random slug-looking snails. Lots of purple on the rock and everything seems happy.