bubbles on rock

<10 = less than 10.

Not many people can get them to zero but as long as if they're less than 10 then that's good. Saying that mine are jumping between 25 and 50 due to me adding a big pooper to my tank:) (Trigger), all my fish are fine, but obviously it's far from ideal!!!!

Oh, and ammonia should have said 0 not )
 
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