I have had a 5 gallon reef tank running for 2 years now but I still know very little about the science of keeping a reef tank. I don't know much about dosing, sumps, controllers, lighting, RODI filters, testing water parameters precisely, wavemakers, coral compatibilities, temperature control (I'm at 82, is that too hot?), adequate flow, WC schedule, algea control, feeding my corals, etc. I don't feel I'm an expert in any of these areas. Most of my corals look good but some are not thriving. I want to know why they aren't but I don't know what's not right yet.