I tested my water last evening and it showed a small amount of ammonia. I had some AmmoLock from API that I have never used before but kept on hand for situations like this. I used it as directed. This morning I tested the water and the ammonia is high. Fish are still swimming around though. I immediately did a 20% water change and waited about 10 minutes. Retested and ammonia was still high. The tank is a RSM 250 and the piece of crap skimmer does not appear to be working. I have a Deltec I just purchased used from a member on here but I am waiting for a new pump for it from Deltec. Any suggestions on what I can do to remove the ammonia before I lose everything? :cry1: