Howdy all. Normally spend all my time in the herp section but got a question for the fish/aquarium keepers on the forum. We have a 180 litre tank set up with an Eheim 2215 canister filter running the spray bay vertically at one end of the tank. We keep 1 x silver sharl, 5 x clown loaches, 2 x rainbows, 3 x kissing gouramis, 4 x bristlenose catfish and 2 angels. We seem to be always having issues with our ammonia levels. Oh and we have been keeping fish for long enough so know the usual remedies....water changes etc. Does anyone on here have any "tricks of the trade" in keeping ammonia levels at a respectable level. We don't over feed and do 25% changes often enough. we use products like Seachem Stability and Prime to treat the water. Also our water hardness is up.....considering a reverse osmosis water filter so that should help in that department but don't think that has anything to do with ammonia...maybe, maybe not. If anyone can assist it would be greatly appreciated.