Should be... depends a bit on some unknowns. Evaporative cooling depends on good air exchange, so if the tank is completely covered it wouldn't be effective. It works better in a dryer climate, etc.
Hi, Thank you for your inquiry. Wasserpest is right. If the tank is completely covered, it wouldn't be effective. If not, yes, two 4 fan models should be sufficient and more efficient than a 6 fan model for your tank.
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