Always used ro/DI on my tanks like I said the bubbles were above the plate and it was creating head, I will check the air intake but I did a pretty thuro check when I got it, didn't put my hands in the water when it started to skim as normal. Sorta baffled as it was skimming like I wanted it to for maybe 15-20 mins then started overflowing again. Still overflowing
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