I mentioned a week or so ago that a friend of mine was giving me a Jack Dempsey. I picked up the fish and have him sitting in my living room right now in a bucket. Unfortunately, the tank was a complete mess. It's a 20L and was in just awful condition. The lady I got it from made it sound like they'd never done anything to the tank other than top it off when it got low. I transported the fish in about 3 gallons of water from the original tank, but I'm going to have to fill the tank up with my own water. Other than slowly adding regular tank water to the bucket, is there any other good way to acclimate him. I'm getting ready to test the water in the bucket to see what exactly I've got there, but I'm guessing this guy is a sure victim of Old Tank Syndrome and I'm afraid a new tank may kill this Dempsey.