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Thanks, that's a good idea. My build is in Colorado as well and it was -5F for several nights in a row last week and only in the +single digits during the day (obviously, I'll be doing my 'daylight' lights at night (as always), but I'm just concerned about when the unit is not running, sitting...

I'm struggling with planning the AC situation for my next 12 light setup as it will be in an area that can get to -10F or colder in the winter months. Most condensers on mini splits I've seen are rated to 5F minimum operating temp. I'm quite certain I'll have freezing problems if the condenser...

What Ph Up & Down brand are you using now?

I have a PAR meter and there is no question that it increases said PAR, especially on the mid - lower portions of the plant. It's not an astonishing amount, but my PAR meter can read zero below the canopy without mylar and I can at least be getting in the 20s - 50s (even more in the right...

You have to drill a decent sized hole to insert them, but easily fixed afterward with a little spackle. They spread the weight out and can handle a lot. I've used them in many applications.

Use screws rather than nails and if you hit a spot where it doesn't line up with the joists, use big toggle bolts through the sheetrock, they are very strong.

You'll be fine. I saw 12% at one point earlier this winter in my room and mothers/veggies were fine. Mist them every so often if it makes you feel better...this will also raise RH temporarily. I already had a humidifier and I tried using it and it only went up a couple of points, i.e...

Just get a 4" to 6" reducer to connect to your fan. Also, get a fan speed controller and you can adjust accordingly, they're like $25. Unless you're running CO2, 81F is too hot (you want to be 75 - 76F) and will only get worse in summer.

Agreed, and don't do it with auto flowering strain.

Pics?

Take your early estimate of $800 and add 30 - 40%. Fans (both in lint and circulating), ducting, sockets, timers, NUTRIENTS, thermometer/hygrometers, Ph meter, PPM meter, timers, Home Depot for all the little odds and ends for things you don't foresee, gas for 10 trips to Home Depot for things...

I'm a Botanicare guy, but I'd HIGHLY recommend you pick of some of Advanced Nutrients PH up and down. I discovered them after I got sick of having to buy gallons of the blue and orange kool aid from GH. AN's PH products are extremely concentrated (I add by the drop in my large systems). A...

I always have to adjust my Ph downward after a nutrient boost. Usually for about 4 - 5 days, I have to adjust upward, then it gets set lock steady. But if the plants are growing quickly, then it's back to add nutes and adjust. Without a doubt, the water volume in a system will reduce it. My...

Thank you. The mini-split is more than sufficient. With outdoor temps in the 50s at night, even in the summer, we run out lights 9pm - 9am most of the time. This drastically reduces the need for cooling and our mini-split automatically throttles itself as needed. Much of the time it simply...

I religiously do 15 on / 15 off. I've even done continuous in ebb/flood. Think about it this way...at continuous, it's basically just an RDWC. I'd rather have my roots getting "too much" circulation (whatever that means) than risk drying them out. 15 on 15 off is perfect for water, nutes...

FWIW, I thought Herbies was kind of cheesy and I was very sick of looking at their stoner mascot, but I've been 2 for 2 in the States with a Visa. Nice assortment of free seeds and stealth packaging as well.

Okay, okay....I didn't catch the sarcasm the first time. Got the joke.

Not a greenhouse, but check my 8000 watt sealed room in link in my signature below. Several videos. Maybe it will provide some help or give you an idea or two. Good luck!

Pics?

Whuhhh?? Responses on this one should be interesting.