Good find! You should be fine to use mostly old water with about 20% fresh (treated with Novaqua/Amquel). What type of filter did you use? If biological, were you able to keep it running (keep the biowheel moving or if a canister, keep water circulating through the biological media). If so, this would be helpful in getting the new tank established. Jewel cichlids are hearty so I wouldn't worry too much.Originally Posted by invadertoast