What size chiller should I get?

[TheJester(Clown)]

I am lookinmg for help is sizing a chiller for my system. I have a 150G tank on first floor. In the basement is the filtration system. it consists of a 17G sump and a 17G fuge and a 75G resrvoir that is about 2/3 full so I figure about 50G. it is then pumped back upstairs from reservoir to main tank. My heaters are in the res. I'm thinking tha I can get away with a 1/10hp chiller. I would run the water from the reservoir to the chiller and then back into the reservoir. Is my thinking sound? Thanks

[marcrothschild]

What sort of lighting? What is your max temp right now? I would not go less than 1/5hp, your chiller will need to operate for much longer periods of time if you under size.

[jimbo045]

I would go stronger than 1/5 too. I use a 1/3 on my 125. JD