Chillers
Chillers are cool! Actually aquarium chillers are very cool for keeping the heat
down on aquariums that are lit with intense lighting such as metal halides. Power
heads and pumps can also add heat to aquarium water. Chillers are a great way
to cool down the aquarium to optimal temperature ranges. The smaller chillers
can come in handy on Nano Reef tanks where the water temperature can fluctuate
quickly.