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2" is fine brother

Wow those are perfect.

They're not the same design. The kids on them dont have a seam and the bottom is all the way down.

If you're planning on using your round buckets, uniseals work better but they are such a bitch to install. I'd recommend you get new containers and use bulkheads. Square/Rectangle containers.

If anything you could dim your 2 board quantum setup & bring it a bit closer if need be.

Ya the DC pumps fuqstik reccomended fragileassassin stumbled across. they're very nice pumps. But you'll only need like 700gph but get one that can do twice that and dial the dimmer back to half power and it will make an enormous difference in the heat it creates in your water.

Yes sir. Just go in through the sides of the buckets not the lids

A clean slate at 0ppms is the best thing you could start with.

Also, these filters last a good 2 yrs if you're just a home user. 20-50gals at any time in your setups total. And the price for replacement is certainly close to that $50/yr figure you stated. There are MANY options and prices on filtering systems.

Oh ya man you've got a really nice open area to run an RDwC. Just connect all the buckets at the bottom like you drew with 2" abs, but start from the back of the 3 rows, 3rd bucket, and come towards the res rather than snaking like you drew. Then just build a manifold from the reservoir and pump...

How large is this space you plan on fitting these 9 buckets in? And are these your everyday, regular, 5gal buckets?

True is all of that. But at 200+ ppm.. I'm not so sure one simple filter will get it close enough to 0.

I'd say it's a good start, but if you're gonna spend money and time learning a filter, why bot just do the whole thing? there's 4 stage system for $70 on Amazon nowadays.

Ya the entire waterfall manifold and you gotta lose the return line with the pump. This way forces you to use air stones still.

https://www.rollitup.org/t/which-pump-for-flooming.988286/#post-14855733

They're called "Bridgelux's Vesta Series" customizable spectrum. Any 4x4 using newer white SMD LEDs requires about 500watts/30w per sqft. The amount of strips you use is up to you whether you wanna run 12 of them @ 40watts a strip, 20w per channel. This would require significant heatsinking. I...

I'd assume you could just turn the potentiometer all the way clockwise to its highest setting of 2700"ish" milliamps, turn it just a bit back, and connect one standard 54V board to it for around 130"ish" watts. this would of course require an adequate heatsink at that much power. But not at its...

Surely. That driver has an internal potentiometer to adjust current output though, so to really know where it's at, you would need to use a multimeter to determine milliamperage. There's an L M and and H version, H ranging I think somewhere between 875-2700mA.

Ya all I'm saying though is water through an RO filter if left in a bowl to evaporate away, will leave no residue or film behind. That's all the chloramine, minerals, fluoride, and whatever else they're putting in our fucking water.

What are you saying? An SF4000 is 450w while 2x SF2000's are 400w combined? 200watts each? What's this have to do with anything?