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So you're going to use plastic water lines as a heat exchanger? Or is it silicon tubing? And air as the medium? Running air through ice water is not going to cool the air like you think it will. Running cold air through nutrient solution is not going to cool the solution like you think it will...

I'm setting up a veg unit for a perpetual operation. Will consist of a wooden box 3' x 3 1/2' x 7' tall. Ill build a shelf half way up and stack 2 DIY aero cloners in here that will double for the veg and first couple transition weeks of flowering, then they will be thrown under hps lighting...

I've been working on an aero system with the black lidded tough box. They are nice and durable. I personally felt it a necessity to paint mine white to help reduce the effect of radiant heat. Are you planning on doing anything like that or insulating it? The only problem I have with these is...

Well, I guess sort of like a flat garden under your vert. I figured by eliminating the hole for the fan, that you could setup several more plants underneath the bulb. The cooltube would allow you to draw the heat off the bulb from above. I know you said you didn't really want anymore...

Have you considered building a simple carbon filtered drying box? There are plans on this site.

Oh, my bad. Yeah, you'll want to use a mag drive pump then. Stainless steel tubing is available on Ebay. Thats what you should use for the heat exchanger. You can use vinyl tubing for the runs. I'd insulate it. Use the Ice/Salt/Water mixture, drop in your submersible pump, and run vinyl over...

Could you lable them? I'd like to know more about the Hawaiian Snow. Did you have any problems with it? I've heard its a finicky bitch...

If you choose to use CFLs, positioning is everything. The light emitted reaches unusable amounts in just a few inches. You should use many of them, very close and distributed around the entire canopy, not just above.

Why not try a vitamin B product like superthrive during the veg stage. You should build up your root mass before flowering and then stop the supplement.

Very nice. +rep. Do you think that if you used a 6" centrifugal fan and a cool tube, that you could put more plants below the lamp and increase yield?

3 cups of pro-mix to 5 cups of coco peat to 2 cups of warm castings... Do you have a specific amount you need to end up with?

It is more efficient to pull air across the bulb. There would be no benefit to reducing between your fixtures, just use 6". As far as noise, either use a filter that is ok for 'blow through', install a store bought muffler, or any length of ducting after the fan will help.

A lot of times, the geographical relationship between you and the company will have a great effect on the final price. Shipping can be a real bitch on big parts like hoods, medium and nutrients. plantlightinghydroponics.com has really good prices on lights. 4hydroponics.com and hydroempire have...

My valuline is the noisiest of 3 brands of 6" fans I run. The Vortex is close, but moves quiet a bit more air. Great price, though.

3-6" if you use an air cooled hood. This will greatly increase your yield by providing more usable light to the plant.

I used MagiCal once. Mine had "floaters" in it. It was like snot floating around in there. I wasn't sure if I got a bad batch. I think I like Cal-Mag, though.

The thermodynamics of pulling air across a bulb vs. pushing are in the favor of the first. A light trap - yeah you guessed it 'traps light'. Light won't bounce around for ever. If you make it round corners, it gives up before it makes it. I'll let you take it from there...

Where you order from may be more of a consideration. That's a drop in the pond for a lot of the bigger grow shops out there. For some of the smaller one's, it may raise suspicion.

$90, huh? What pump are you using?

How about an ionizer?