I think the easiest solution for tanks without chillers and what not... just cut back your photoperiod. Turn the lights on in the AM , and off once it hits noon.. keep 'em off til later in the evening.. turn 'em back on again if need be. That's what I am doing.... 20g with 250w HQI in a bedroom and I am at 83-84... not too bad considering.
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20g BB Mixed Reef // Coralife 150w HQI // AquaC Nano // Koralia 1 & Seio 820 // Jager 200w // AC50
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