Review on π 4-Ounce Kordon #37344 Methylene Blue for Aquarium - General Disease Prevention Treatment by Christine Turner
The water will be blue for a while, but it works!
The water was dark blue when used, after a few days we did a 1/2 water change in the pool, then again a few days later and the water is still with a blue cast. I had to change the water filters every time. The fish are still doing great!
- Good thing
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