He is in a 100g reef. I've had no problem keeping stable parameters that I am aware of. I haven't had any loss of fish or inverts. I have lost snails (not exactly sure why), but have kept other shrimp, corals, anemones, nas. snails, and brittle stars for over 2 years with no problems. I haven't been testing my parameters that often lately, but with nothing dying off, I assume these are stable. Hope this helps.