The main reason people don't use them in planted tanks is because they outgas carbon dioxide. If you aren't injecting carbon dioxide, then it shouldn't matter because there is minimal co2 in the water. But if you are, you should not run the airstones in the day time.
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*Kristin*
5 Planted tanks:
55g, 40g, 29g, 10g, 5.5g
10g N. multifasciatus tank, 5.5g Platy fry
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