Light, inert media like Pro-Mix HP or mix of peat/coco & perlite and/or vermiculite. A super soil or other amended soil containing a large percent of compost is not recommended for octopots and is better for other SIP methods like earthboxes or similar diy SIPs.
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These aren’t super cheap, but in looking around at DWC/Bubbleponics/Autopot parts they might be the best pre-made setup I’ve seen. For $20 the basket is much bigger (8” actual width at the top) and it has two integrated air line ports one for a bubbler loop pre-installed, just needs a bucket and air stone for the other air port. With this much basket and root space it might benefit from a 6 gallon brew bucket and I bet you could grow a single plant monster out in a 4x4 or 5x5 or fill a room with a half dozen plants! Pretty neat option for folks who wanted to run a deeper water level and push growth with aeroponics.
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Just say yes, it feels much better then No 
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That won’t be coming from my direction. I habitually pop more seeds than I have space to grow—and then I overveg to really cause a problem.
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Beautiful!
What’s the amendment on the top of the pots?
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just rice hull to stop potential algea/bugs whathaveyou
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Got the 30 gallon nalgene hooked up to the newly setup octopup watering system. The control works great! Thanks so much for this walkthrough @GrouchyOldMan . And thanks everyone for all your great input. 
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Beautiful setup @Rhino_buddy!
How many gallons will that big Rez hold? How many octopups is your system feeding?
Any chance we could get a peek inside that lucky tent?
Is that a second input feed going to your controller box? That’s a thought, pre-plumbed for bigger capacity when/if needed?
-Grouchy 
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It’s a 30 gallon res. I have another I’m thinking about setting up in the veg tent. Inside the tent isn’t really ready. I have 2 pups in there and 2 large 7gal plants.
They’re almost done and time ready to move the rest of them in there. Was water-tight testing them the other day and not a one leaked. 
Gonna harvest the plants in ~ a week then I’ll show off the 3x4 tent. 
Can’t wait to get it all set up. 
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That’s actually a line directly from the tank for quicker filling/ watering other plants. I’m not against that idea though. I have 3 more 30 gallon nalgene containers and another stand like that one. I could just set and forget for a whole run with all those probably. 
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I’m way jealous of that bitchin stand for your rez! I could set my joint up with one of those and feed my Girls for a month or two!
Are you concerned about algae build in your big white rez? Are you adding nutes to that big barrel?
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I am and I am. 
My basement is an old cellar under my 115 year old house. My tents keep the wildlife out.
But saying that. The only time there’s light on down there is when I turn them on. And my wife let’s me know if I forget. There a 
red light on the switch at the top of the stairs. Hahah.
But I’m gonna move this bad boy down there tomorrow.
Sorry. Junky side of my container.
KU was throwing those things away though. Fuck industry waste.
So I’m going to experiment and see if algae grows in the dark, and how quickly it’ll be an issue. 
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Getting tired of filling every day now…might have to read this thread 
My bigger ladies, only 4 weeks in are sucking the gallon in a day now. Like the ability to change my nute profile daily, but daily watering is getting a chore. Might just get another pump hose wand setup as i have 2 different rooms . Either that or put a auto filler on them
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Join the Party Brother Jet!
Plenty of peeps here to answer any questions that come up.
-Grouchy
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Any ideas for a water level indicator in the control box, preferably one that sends out an electrical signal once the water has emptied out?
I would like to use that to control a solenoid valve so as to push a dry cycle automatically after x litres of water has been consumed by the plants
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This system doesn’t really work that way @SilicanPelican, so it may not be the best starting point for what you describe. This design emphasizes simplicity, no pumps, no electricity, only one float valve.
I think that several OG growers work with highly automated hydro systems that might be a better fit for your needs. @Mr.Sparkle comes to mind, but there are many others. Seek and ye shall find…
-Grouchy
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Hi Grouchy!
Sorry if it sounded too complex 
I am the laziest grower you’d find so I love the system.
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Theoretically you could use an esp32 device or aquara device or similar that uses a water/leak detector circuit and use it to trigger when the sensor reports dry. But you’d likely have to build & modify a sensor yourself for that use. Modifications would likely be necessary in order to not submerge the sensor, which could foul the sensor over time. Since many water/leak sensors are designed to conserve battery life by occasionally reporting dry then sleeping until water trips the sensor to report wet, using the sensor in reverse such that it’s always reporting wet until it finally reports dry might cause significant battery drain for the sensor.
I don’t think Grouchy was faulting you for trying to improve upon the idea, just noting that the system in this thread may not be the best jumping off point for your idea.
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