 gas?
i have a new tank going thru its cycle. ther are pockets of air under the surface of the sand, against the glass. they look like grey colored pockets from a distance. is this nitrogen gas forming?
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210g AGA, megaflow 4, mag 18,aqua C EV 240 skimmer, koralia #2#3,coralife prolight 3-250w MH 4-96w actinics 4 LED lunars, 280lbs.LS, 150lbs. LR
tank filled 04/01/08
residents;3 chromis, 2 blue legs, 6 turbos, 10 astrias |