i have the ones with the pearly looking backs and they are awesome help to keep algea down. but the ones i have are like maybe a mm to 2mm long and there are thousands of them dont seem to be causeing any damage but i want to make sure
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4' custom tank all starfire. End overflow
2 AI sols
reef keeper lite
mp40wes
Diablo skimmer
Mag 12 return pump also feeding two reactors
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