I had a crash due to my mistake of doing too many water changes and starting a MASSIVE spike of ammonia (beyond api scale) and killed my clownfish and all corals. On top of this my tank sitter overfed a ton too and this tank is just beyond saving. I am going to redo with a 20 gallon, new/old live rock (If old can work for the cycle), new sand, and new ro/di water.