I built a 150 gallon reef with live rock and few elegance corals, mushrooms; I bought five expensive angel fish the size of your hand. So I get hired by a computer company had to go to Mexico City for a project, my girlfriend “rushed” a water change, did not check temperature, salinity, just pumped out the water, pumped the RO water in, “killed” the habitants (fish, corals, the whole nine yards). In the same, tank, one three dollar yellow damsel would pick at Elegance corals, I tried a trap, fishing pole with a baby hook, and then pumped the water out into 3-4 45 gallon new rubber maid garbage cans, killed the damsel, filled it back up. Never easy is it.