The majority of test kits offered are more than accurate to maintain a FW or SW setu0p. However thewre is a lot ofdifferences n kits as to ease of use and interpreting what readings yu have. I like Salifert for Calcium and ALK tests ........but use Fastest or Seatest for all other tests such as Ammonia, PH, NItrate and Nitrite. There really is no need to get lab grade kits to maintain an aquarium by any means. If lab grade kits were needed then Salifert would be out there with Red Sea or tetra brand kits........