temp.

[cwb_reeftank]

does anyone have any tips on how to cool a reef tank without a chiller. I have metal halides now and I leave them on for about 3 hours and it brings the temp up from 80 to about 83.5ish I let it go 4 hours and it went to 84.2 I was wanting to have my metal halides come on for 6 hours and my t5s for 12?

 

[Randy Holmes-Farley Verified Community Expert]

I cool my tank in summer by running cold tap water through a big coil of plastic tubing in the sump.

The water then goes outside to water the plants.