I've learned that this is a required tool for freshwater aquarium owners! If I didn't have this, my axolotl would be in terrible shape. These work better than the paper strips that can be used for testing, and it's nice that these are the same bottles that you can buy in the individual testing kit. I use the ammonia testing solution almost every day, so I was able to buy a smaller refill kit and just replace those two bottles instead of replacing the entire testing kit.
Rating:
[5 of 5 Stars!]