I'm curious to know too. I have a refugeeum in my 120 and it gets sand in my display tank all the time during maintenance. Currently cycling 300 litre, considering marine pure as an alternative
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I've had my reef tank for a year now, lost a clown in the first month due to no cover. Had an acrylic cover custom made and never had a problem since....I know folk out there advise against covering their tanks, just curious to know why?
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