I just moved an established (up 1.5 yr) 75 into a 120. Moved filter, media, substrate (less than 1" thick), water. Added more substrate. About a month later, I went down one morning to find everything dead. No signs of stress, disease or trama. They have been eating. There was a slippery dick wrasse & a domino damsel. Had a lionfish, but last him earlier in the week. He stopped eating about 3 days earlier. Other than that, all has been well. No ammonia, nitrite or nitrate spikes. No temperature spikes or anything abnormal. Any ideas? PH
& spec grav. are normal. THey are the day before. Filtration is from a Fluval 404 & Quicksand 2 flulidizedbed filter. Any ideas?
At this point, I'm dumping all the water & letting the sand dry out. The sand filter is being replaced with a wet/dry (homemade.) Though I don't blame the sand filter for loosing the tank, its getting replaced anyway...