I know this is a no no. But I regularly check all parameters and everything stays well within tolerances. In 8 months, I have only added distilled water to keep salinity within range and all seems well. I have a few soft corals, leathers, mushrooms, frogspawn and recently added some nice zoanthids. My concern is that they seem to be loosing color, and the frogspawn has completely retracted into itself. Everything else seems to be fine and living well. So, what are the downfalls of not doing regular water changes. Thanks in advance for any help.