The API freshwater testing kit is wonderful. It is just the tubes tend to break if your are not careful. One broke one my son and one on me. Thus I ordered more test tubes. So far these seem to be working out great. The 5 ml marking is nice to have on the tube. Noticed some of the tubes sit a little snug in the API test kit area that the tubes are stored in vertically.Overall nice to have spares on hand.
Rating:
[4 of 5 Stars!]