I had some time to kill this weekend, and I decided to switch some tanks around. The 20g high SW
tank was switched to a 20g regular and I must say the rockwork is much better looking in there!
Everything came out okay with the exception of the cucumber. When I did the change, all the parameters were matched exactly with the exception of the water temp....it was 2º higher. I couldn't acclimate the cuke to the temp change because it was attached to a large rock (ever try and remove one of these things?) and all my buckets and bins were being used. This morning when I got up, the cuke was still sitting on top of the rock, then about 1/2 hour later when I looked again, he started losing his guts. I grabbed him out of there before they were completely out of him. I put fresh carbon in the filter but I'm wondering how long should I leave the carbon in there before replacing? BTW, everything else in the tank looks fine and the fish, crabs etc are acting normally.