I went to pet smart and asked them when i first got my 55 gallon and they showed me what they used, and its them jungle test strips there 10 dollars each bottle one does 6 different test and the other bottle does ammonia. there real nice because you dont have to take any water out and test it you dont need a sample theres no messing with anything you just take a strip out and dunk it in the tank then you have your reading. so i figured if its good enough for petsmart to use and it works on salt water also. I would try them out. So i bought it and have been using it for a year now its so easy.