I had previously read that they shouldn't go in the stand because I know they output heat, BUT, the only reason I'm considering it now is because that's how it was set up in the previous owner's house, and they have cooling fans blowing through the stand. The previous owner said that the chiller was hardly ever on, too, and he lives in the same environment I do, so I figured I could give it a try.
Thanks for the advice on putting one on each return line... Before your post I was considering putting them on the same line again, because I figure that much resistance on that line will bring it down to a lower flow rate than the line w/ nothing on it, but that may be good in optimizing the cooling effects of the chiller - bringing it down closer to 600
gph instead of up at 1000
gph... although really, it's hard to figure out how much is going where without any flow meters. My brother suggested to put one on each line for the same reasoning you did, and he is who I'm depending on to essentially figure out all of the plumbing and get it running. He's very handy, but not an aquarium expert by any means, which is why I'm asking so many questions about it here to get us some guidance.