what size chiller

[dadonoflaw]

i ran the pc's and mh's for 8 hours together today and it was about 80 degrees farenheit outside and the temp in the tank was 90 degrees. what size chiller would i need for a 125 gal tank?

[JayBeDriften]

I would recommend a chiller with at least 1/3hp so that you can adequetly bring the termperature of the water down.

[fat walrus]

Depends on the brand. But no less than 1/4 hp even from the most expensive brands. I would try to go 1/3 to 1/2hp.

Don't forget you have to take into consideration how hot your room gets during the worse of heatwaves, and how well ventilated your equipment and lights are.