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140 gallon RDWC

Bennyweed1

Active member
Veteran
Whats going on?

Starting a new journal because I am going to run a hydro system. My entire mmj career I have been a organic guy but I wanna try something new.

I am building a RDWC system using 8 - 27 gallon totes and a control hooked up to an RO/DI and float valve. I want to run big plants with at least 6-8 wks of veg.

I am going to set my system up different then most I have seen. Usually you see a pump at the end of the series chain and pushing back into the control. I understand it creates current but it lacks the ability to create an air lift like seen in AACT brewers.

My system I will be drawing out of the control with a submerged pump expelling water from the top down into each plant site. This should break surface tension creating much more dissolved o2 than air stones. The same holds true for AACT brewers, the concept is the same so I dont understand why most RDWC guys do it that way?

Anyway, my total water volume will be around 140 gallons so hopefully I can go about 20 or more days before needing a flush. The control will be hooked up to an RO/DI with a float valve and I will be running KISS or maxibloom stand alone.

I will have 1600w of lighting, 2 - 600w HPS and a 400w MH, the grow area around the bulbs will measure 9.8' long X 6.5' wide, did I mention this will be a vertical barebulb garden?

I want to make things as simple as possible so I plan on running plumbed drain lines and plumbed refill lines off the tap or RO/DI on a float valve, not sure yet.

The problem with RO/DI is I will need some 55gallon drums to fill and gravity feed back into the RDWC system when I flush because it will take a few days to drip 150 gallons from the RO/DI filter. So the question is, is it worth the hassle or should I just attach a hose to the tap and fill it that way? My tap is around 110ppm, my RO/DI is 0-7ppm.

I have an active organic garden as I speak so I will be transitioning to RDWC over the next 6 weeks.

I have 5 different strains:

Jack Flash
Pure Power Plant
Purple Kush (not purple at all)
White Widow X Big Bud
Critical Sensi Star

All these plants finish nice and ripe at 9 wks. All these strains have proven themselves to be heavy yielders. I hope to hit 2.5lb every 9 wks. It will be a harvest and reload design, so I will be vegging the new crop as the older crop is flowering.

Anyway, hopefully this shit works out for me.... I want it to be as simply as possible for an RDWC system. Dont be shy, give me all the criticism because I need this to be a success. Thanks for reading.

Here is the first three sites being mock setup because I plan on adding the sites in chunks every three weeks to cycle out my soil plants. That way I dont experience any down town on production:

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I will attach all the totes together with 1.5" PVC and uniseals.

The supply line is 1/2" and feeds a manifold in each tote with two spouts. I dont know what size pump I will need to move enough water. I am thinking a 1000 or 1200 gpm pump. What do you think?

And here are a few from my current setup to leave on a good foot:

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overbudjet

Active member
Veteran
I.m.h.o. 1.5 inch is way to small for 6~8 veg. bush! I use 3 inch uniseal\17gal tub
And sometime i have to remove root from the pipe or they clog it.
 

Snype

Active member
Veteran
Not sure if I'm not understanding something but you are trying to get 2.5 pounds off of 8 plants with 1600 watts in 27 Gallon Totes. Sounds a bit over kill and the pipes seem small for 6-8 weeks of VEG. A 6 to 8 week Veg in RDWC sounds off for that weight. With a 2 week VEG with 6 plants and 16" centers and 1 x 1000 watts can easily yield 2 pounds with only a 2 week VEG. Maybe I'm not reading this right. I like the idea of the waterfall pipes instead of air stones. I've been meaning to experiment with that technique. Good luck with the grow. Hopefully you get like 5 pounds at least for all that VEG time.
 

Bennyweed1

Active member
Veteran
Not sure if I'm not understanding something but you are trying to get 2.5 pounds off of 8 plants with 1600 watts in 27 Gallon Totes. Sounds a bit over kill and the pipes seem small for 6-8 weeks of VEG. A 6 to 8 week Veg in RDWC sounds off for that weight. With a 2 week VEG with 6 plants and 16" centers and 1 x 1000 watts can easily yield 2 pounds with only a 2 week VEG. Maybe I'm not reading this right. I like the idea of the waterfall pipes instead of air stones. I've been meaning to experiment with that technique. Good luck with the grow. Hopefully you get like 5 pounds at least for all that VEG time.

Wow guys that is real good news, I was over estimating! Like I said before, I been a soil guy my whole career so I am new to this hydro beast.

As too the 1.5 uniseals, its already done so I am screwed there. I knew I should have went larger pipe size but didnt because I had 10 1.5s on hand. Thats why I am using such large totes though, to give the roots enough room........so hopefully they wont wanna clog the pipes.

Anyways, thanks for the inspiration. I am so so excited to get this hydro project running. I gotta wait until the 28th.

Stick around, I know Im gonna need y'alls help!
 

overbudjet

Active member
Veteran
Roots will follow the current so they will go strait into your pipe! Do yourself a favor and install an overflow drain on those tote(just in case).
 

Bennyweed1

Active member
Veteran
Thanks for all the input so far folks! So I have a problem on my hands regarding these small 1.5" connection lines I did.

I have to make them work now because I already drilled the holes.

So my solution is I think I will put screens over the 1.5" pipes and install baffles in the totes to disrupt the current so the roots don't all gravitate to the pipes. Think that will help?

My next question is.....

How do you RDWC guys completely drain your plant sites? You can only get the connection piping so close to the bottom but in my system there will about 2-3" of water after they are drained due to the fact the connection piping can only sit so low.

What is the solution to this? Thanks in advance.
 

Snype

Active member
Veteran
Thanks for all the input so far folks! So I have a problem on my hands regarding these small 1.5" connection lines I did.

I have to make them work now because I already drilled the holes.

So my solution is I think I will put screens over the 1.5" pipes and install baffles in the totes to disrupt the current so the roots don't all gravitate to the pipes. Think that will help?

My next question is.....

How do you RDWC guys completely drain your plant sites? You can only get the connection piping so close to the bottom but in my system there will about 2-3" of water after they are drained due to the fact the connection piping can only sit so low.

What is the solution to this? Thanks in advance.

Not sure if the screen will help but it shouldn't be that big of a deal for 1 grow.

As far as the shop vac goes, I only have to use it after I harvest to get everything out. When I'm doing my nute changes, I drain my systems with a boiler drain adapter attached to a hose right to the bathtub:

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then I fill up the system about 1/4 of the way with tap water and drain it again. I do that to mix up the remaining left over solution in the system and then I fill up the entire system again and add my nutes and pH down.
 
In my 200 gallon systems using 50 gallon rubbermaid totes with 2" bulkheads there is about 20 gallons left after my pump starts sucking air, I just leave the 20 gallons and refill with 200 gallons of RO and mix nutes/adjust....never see a problem with any toxicities etc. from leaving the 10% of original solution stuck in the bottom. I only vacuum everything dry when I'm cleaning between runs.
 

Bennyweed1

Active member
Veteran
I have my first three sites ready to go into the bloom room on the 28th. Everything is plumbed and ready to rock.

I got a flotec 3000gpm waterfall/utility pump..it really moves a lot of water. I dry fired the first three for about 2 hours, everything is good to go.

Snype, I for sure borrowed that boiled spigot concept and installed a shutoff valve to direct full flow through the spigot when I am ready to flush the sys.

The only thing left to do is cut the plant holes into the lids.

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Cant wait to get some plants in this RDWC sys!
 
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Bennyweed1

Active member
Veteran
I got the plant supports all built for the first three sites going into bloom the 29th. I really like the finished product, they will allow me to train each plant individually along the way. They took about 1.5-2hrs to build for the first three sites.....6 more to go when the time comes.

How do they look for a first time RDWC guy?

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Nothing but 1/2" PVC and orange security fencing


I also have three plants veggin' right now under some spare LEDs
White Widow X Big Bud
Jack Flash
Purple Kush

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Here is the White Widow X Big Bud, it is about 2 weeks into veg:

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Bennyweed1

Active member
Veteran
Here is the Purple Kush. Funny story, this plant was in soil about a week ago, but I needed a strong healthy plant so I would have 3 total plants ready for bloom. I pulled her out and rinsed the roots off, the roots are starting to grow back now....yaaaay
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And here is the Jack Flash, put into rock wool about a week about
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As you can see I dont have a DWC bucket for her yet...lol...I gotta build the rest next, but thats a 6" rock wool cube so I have sometime.

How big should I veg these girls? I dont know if they will even be ready by the 29th. I want all of them to be at least 24" tall before going into bloom. 24" is the bottom of the screens where they break off at a 45 degree angle. Any input would be awesome, I am unfamiliar with stretch in hydro.....

My organic girls will stretch about 65-75% of there starting height...

Anyway, how am I looking so far? I am so excited to kick this off.
I have a rather cool idea I tossed together in the grow room design section concerning automated pH.....check it out if ya want:https://www.icmag.com/ic/showthread.php?t=272753

till' next time.
 
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