I walked in the house looked in my tank and noticed that it was slightly cloudy. But couldn't see where it was coming from at first. Then I saw what looked like smoke coming out of two of my bta's. They have been doing this for at least a half hour now. They have been in my tank for five years now and I have never seen this before. does anybody know what is going on? Is this harmful to my tank? Should I do a water change? Should I replace my carbon in my reactor? thanks!
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