chiller size

Unfortunately I am forced to get a chiller. Just a couple of questions. What size chiller should I use for a waterfarm 8 pack? Total gallons is approximately 25. Also, does it come with a pump? If not - what size submersable pump should I purchase?

Thanks!

I once ran eight tubes (10'x6") aero and tandem 3/4 hp pumps-----2min on----15 min off. 100 gallon total rez volume.

I first tried using a 1/10 hp chiller-----too small--------switched to a 1/4 hp chiller ($500). Worked great-----nute temps stay around 69f.

My chiller required a circulation pump ($100us). Check out hydrofarm website and you'll find the gph rating requirement for the pump.

A~