So I have 2 clowns and a duncan that do just fine, but I keep losing snails and crabs. The emerald died yesterday which I thought were one of the hardiest ones there were. 2 of the snails both a certain type pretty well died as soon as they entered never even tried to move. My ammonia and nitrite are at 0, and stays under 10. I have no idea what my ph is when in light it looks like 7.8 but next to card it looks like 8.2... my salinity is super annoying I have 2 hydrometer one says .021 other says .023 and refactor says .026 at normal water level but goes up to .027 as it evaporates (I dont have a ato yet).