Just depends on how much evap and top off you want to deal with. I have about 110g of total volume and with 2x 250w MH's and fans only, I have to top off about 3-4 gallons per day. If I used a chiller, I doubt the evap would be any more than .5g per day or less.
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Originally posted by Duff Man
I don't want to hijack, but I'm in a similar situation. For all of you that use MH, how many use chillers? I am thinking about two 175 watt MH retros in my canopy or 6 T5's retro.
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