Increases the pH value of the track! I added this to a month old tank that had previously had a stable pH. I then watched my pH rise with no further changes in the tank. So I put the bag of ceramic rings in some tap water (pH 7.4) to see if the rings raised the pH. I tested the water after 2 days and it's 8.8+! I made a second try just to be sure. These rings raise the pH of your aquarium to unsafe levels!
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