So I made the mistake of making my Biocube into a coral reef tank. I tried, some thrived and some didn’t. I moved my healthy corals into a 75 gallon tank with Red Sea reefled lighting and a canister filter. Everything is doing so much better. So back to my original question. I tested the tank and everything is perfect chemically so I got a fuzzy dwarf lionfish. Was wondering if I could place a spiny urchin in there with him to help with the algae? Was also wondering how many hermits and snails would be appropriate. Thanks everyone