I have three heads and I thought two heads might not have enough power. It practically does not shoot in the air. It didn't cool my tank at all. The looks and size seemed nice, but it's very weak and doesn't cool at all. I think I can cool my aquarium better by blowing on the water. I need a 6+ head model to even see the result. I only have 40 liters. Very disappointed. Maybe for 5 gallons that would be fine.
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