My main tank (210g mixed reef) is the only topless tank in my place. Once I added glass hinged tops on the other tanks (6 others), evaporation dropped to 20-25%. I used to top up my fw planted every 2 or 3 days, now once a week at the most. My fowlr & ex-seahorse tank is hooked up to a auto-topoff & now the same amount of water will last 3 times longer.
Light is diminished alot with glass tops, especially if you don't clean them constantly.
Thats why my main reef is left topless.
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If you see it, can take care of it, better get it or put it on hold. Otherwise, it'll be gone & you'll regret it!
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