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I'm confused (easoily done) Does this controller control a CO2 generator or a CO2 tank?

Thanks, Chuck, much appreciated.

Grower's House calculator for my size room indicates 2 cu. ft/hr is recommended, so I'm trying to determine what size tank, how long it lasts and any added equipment that is needed to buy WITH the tank (plus the tank size).

How big a CO2 tank and how often does it get replenished?

Okay, so for 4 x 1000W HPS, I'd still need a carbon filter but w/o an exhaust vent, such as this...

Okay, so if I have a minisplit at 24K Btu to run 4 lights in a sealed room, do I need one exhaust vent with a phresh filter, too (at 800 or more CFM pulling out through the filter)? Or do I skip the carbon filter entirely? And are there high quality filters besides Phresh?

At the Minisplit Warehouse link, the Senville I just bought was $200 more. But they do have a much better description of it there: http://www.minisplitwarehouse.com/product/senville-24000btu-19-seer-inverter-mini-split-heat-pump-ac-220v-aura-series

Thanks for the advice.... as I found some good reflectors with a bigger footprint, I just dropped a couple lights (to 4). Those, plus an inline fan/filter, 4 oscillating wall fans and (possibly) an 8 bulb T5 oughta take up around 20 of the 24 BTU. They tossed in 25' of copper tubing that I'll...

I just ordered this 24K unit. It was in that e-bay top ten, a 19 SEER Energy Star. I phoned them and the 7 yr warranty is legit. They said if I order by phone, from Compton, CA to Oregon would be 5 biz days...

Well, sure. I thought I'd done my homework. I'd planned to go with two portables. But I'd read on a thread, I think at 420.com, that I needed 2200 BTU per 1000W, so I was dialed in to half of what I actually needed. The other, more pertinent thing, was I planned to make the first grow in two...

I've bought 2 of these 5x5s at $143 ea, free shipping, from FL. They beat a lot of the cheap ones, easily. http://www.ebay.com/itm/Hydroponic-Grow-Growing-Tent-Box-Room-Greenhouse-System-Mylar-5-x-5-x-68-/390966453249?pt=LH_DefaultDomain_0&hash=item5b076aa401

Haven't purchased the lights yet. So I could only do 4 - air-cooled 1000W DEs with an 18,000 BTU mini-split? I have a neighbor doing 2 of those lights with a portable 2 duct, 6000 BTU unit and I thought the mini-splits were more efficient. Gotta do something quick as my veg stuff could be...

That Opticlimate, for 6 1000W HPS would cost about $3300. And might not be available in the US. http://www.growell.co.uk/opticlimate-systems-pro-3-series.html

5 aircooled DE lights in a 14x15 rooom: would an 18,000 BTU mini-split cover it? I see Toshiba and others in the $800-$1000 range. And a mitsubishi 24000 BTU around $1050 local HVAC companies are talking 3 tons or more at 36000 BTU which seems excessive to me.

I have a 5x5 tent I'm vegging in at a different location, with T-5s. I'm setting up a second tent there for some mother plants to clone from. At this new locale, it'll only be 12/12s., plus a small side closet for some T-5 seedlings in veg. Of all the little expenses, only two were a shock...

Wa'all, I reckon it's more than just the money. It's mmore like a series of little price shocks keep stretching the budget out and I just need to make a choice whether to scale back my ambition some to find a good comfort level as I enter the phase of big electricity bills. In otherwords, I...

So, any fresh drops coming? And btw, is Bodhi the same as the author, Bodhi Moon?

Getting ready to flip to a room I'm setting up that's 210 sq ft with 6- 1000W DEs and two 8-bulb T5s. I'll be drawing air from an adjoining room then ducting back into an unused bathroom where a more powerful fan will push it up through the existing bath vent duct. So I have to cool the grow...

I can't speak for these products, but the top seller is $85.http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2051541.m570.l1313.TR10.TRC0.A0.H0.Xcarbon+filter.TRS0&_nkw=carbon+filter&_sacat=11700

I'm no Obamabot but he just freed more drug war prisoners than all presidents in the past 50 years combined have done. It is a promising start. And don't forget, most presidential pardons come as they leave office. But I know. We're all impatient for the rest to come out. I"m guessing some...