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I started writing an actual reply to this post, and then thought...why? Try this website called "Google" if you want to see people rocking the E/F systems. Maybe it can also clue you in as to WHY you have been growing for 20+ years and tried everything and know everything and still suck so bad...

Been using rapid rooters for clones for a long time, and just recently for seedlings. I find it is very very difficult to over water them. Mine are sitting in a 1/4 inch or so of water 24/7 and they are doing just fine, and they are about the same age, 7-10 days. I wouldn't add nutes, but 1...

It is definitely hard to find solid info, especially on Aero. Check out the thread called "uc vs aeroponics". This is one of the best threads I have found on Aero, and it also includes a link to another really great thread on another forum. I would just absorb as much info as possible, take...

Ohhhh so in other words the real answer would be 20 - 4.45998445998446 = 15.54001554001554 So 15.54001554001554 = Gals of nutrient solution in the tank @ 110 PSI? Or did I misunderstand something... Spreadsheet is a great idea. I'll whip one up after work tonight. :) Thanks a ton man

Found a really good explanation of using boyles law to calculate this here. Phew! That makes a lot more sense to me now. :) John can you please check my math for me, as I believe this is correct: This is assuming I am hand pumping a 20G tank to 110psi with a factory pre-charge of 10...

Thanks Bobby, Now I admit I only made it through the 9th grade, and I don't much have a brain good at equations. I'm confused as to what formula I should be looking at on that page. Closed Compression Expansion Tank? Is that correct? That seems to make the most sense based on the short...

John- What formula do you use for calculating how much a pressure tank can hold vs PSI in the tank? You mentioned a couple times a 4.4 gal tank can hold 0.04856 or whatever at XXXpsi. How can we calculate this ourselves?

Wow really glad I came back and checked this thread! The idea of using a manual pump to charge an accumulator tank is new to me...and I think it is an absolutely badass idea! Very simple using the manual method, I mean who needs automatic when you only need to charge maybe once or twice a...

I hadn't heard that. Source? I'm just going by what's on their page. Says 125psi: http://www.mistking.com/home.php?cat=259 I can't seem to find anything to contradict that. I guess I could be missing something. Enlighten me?

Safe bet back off the nutes til things get better.

Very nice. Tickles my jealousy bone for sure. You must be rolling in multiple forms of greenery. :)

I'm not sure why everyone thinks aero is so expensive and complicated. Perhaps that is true for large scale setups but it would seem UC would scale to be more expensive with a larger grow as well, requiring bigger pumps, more plumbing, etc. The days of accumulator tanks and expensive brass...

Not sure how well they would work with your system but mistking.com sells what you are looking for. The pumps run at 110 psi putting out 55 micron droplets, they can run dry, and are designed for sub 2 second interval misting times. I am planning on using one for an upcoming grow, but I have...