TommyDumper

Member
I have been growing RDWC since I began 2 years ago. I run a sea of green, taking clones of my best plants and vegging in a 4x8 tent with a simple tray system.
My main room for flower is 14 feet deep with a door on one end in the basement with a low ceiling. I hand 3 Fluence 2p lights over 12 plants in 5 gallon buckets using clay pebbles in a typical active aqua flow and grow RDWC. My 55 gallon drum is separated from the grow room to keep the feeding water cool. I use a Saturn 5 controller to control everything and a single burner CO2 maker that goes on for 4 min off for 28 during the day I use House and Garden nutrients.

House and Garden Nutrients Aqua Flakes A and B
Drip Clean
Roots Excelerator Silver
Amino Treatment
Multi Zen
Nitrogen Boost
Bud XL
Shooting Powder
Great White Mycorrhizae
SLF-100
GH Floral Nectar
FoxFarm ChaChing

Last grow I had was in the middle of summer and I'm pretty sure my water temps were a bit high and I made it through but I'm pretty sure my roots were rotting and when I harvested I noticed many of my buckets had roots in the bottom clogging the screens, some worse than others. I also noticed aphids flying out of my clay pebbles in the buckets which tells me they were lunching on the root rot. at week 3 I defoliates and lollipopped and when I did I cleaned the buckets and cut off all the roots coming thru the holes in the buckets (probably shouldn't have done that so I will not do that this time.)20200921_123311.jpg20200921_123317.jpg20200921_123323.jpg20200921_123355.jpg20200921_123358.jpg20200921_123311.jpg20200921_123317.jpg20200921_123323.jpg20200921_123355.jpg20200921_123358.jpg20200921_123432.jpg20200921_123311.jpg20200921_123317.jpg

My plants were small when I transplanted to the flower tent so I continued to veg in the flower room for 3 weeks and got them. At first I was watering for 30 min or 2 click 5 times a day, 18 hours on. I quickly learned that was too much so I switched to 1 click, I did that for 4 or 5 days and went to 4 times a day. Last Friday I flipped to flower and watering 1 click or 15 min flood then drain 3 times a day. Last Friday I cleaned all of the buckets, some of which were clogged and my roots are all extending down below the holes in the buckets.

1 more thing. I lost the drain pump after 2 years in my brain bucket, last June and I h.ave not been able to get an exact replacement. I've since learned that "RDWC Pumps Matter" :-P But, Hydro Farm has not had replacement pumps in stock since then, hopefully they finally come in tomorrow. Anyway I have blown through 5 different pumps since. Apparently the normal pumps are faster that gravity and the switch triggers the pumps to run dry too long and eventually they die. So I've got that going for me which is nice. (Caddy Shack reference). I now have to babysit every feeding to make sure my buckets empty. I first learned this when I noticed my brain bucket about 1/2 full after a feeding. I had to shake my pump unplug and then re-plug it to get it going again. I tipped the brain bucket towards the pump until all of the water stopped flooding from the plants and everything returned back to the reservoir. I have to babysit this every time now until the new replacement pump arrives.

So my roots are stained and this always makes me nervous. the buckets have residue after feeding and my water temps are under control but my ph goes wacky after every feeding. it seems to creep up. I generally keep it between 5.8 and 6.2 but after a feeding it will jump to 6.7 for example. I stir the reservoir, check it again, add a bit to ph down (like 30ml to 50 gallon) and stir, my ph will plummet to 5.1. I have learned not to trust this and I walk away and come back hours later to retest, my ph is back to 6.2????
Could this be from temperature fluctuation? The res is like 19C or 66F and it feeds the plants in a room that's 82-86F, humidity under 55% and maybe the water temp goes up before returning making the ph go up. Or could it be something from the plants after they drink?
I just want to be re-assured that the plants are happy and I am doing everything I should. Hopefully this will begin a thread that helps others in the future.
 

myke

Well-Known Member
Hey very cool,ill have to re read your post several times so i fully understand what you got going here.My first thought is this looks to complicated.lol is this drain to waste?Do the buckets at the bottom go dry?
Im an RDWC guy so im top feed, drains on the bottom, roots live in water with air and waterfalls.very simple.
again ill read your post a few times.
 

myke

Well-Known Member
Your 55 g drum has a lot of air pumping in yes? i can see the pump.THis is whats making your ph rise ill bet.
 

TommyDumper

Member
Really, air stones make ph rise? I had no idea. Yes, I run the air pump with 2 air stones. I fill the res to 50 gallons and change the res out weekly. of course I have to top it up with fresh water a few times before the week is up
 

TommyDumper

Member
Hey very cool,ill have to re read your post several times so i fully understand what you got going here.My first thought is this looks to complicated.lol is this drain to waste?Do the buckets at the bottom go dry?
Im an RDWC guy so im top feed, drains on the bottom, roots live in water with air and waterfalls.very simple.
again ill read your post a few times.
Thank you Myke!
 

myke

Well-Known Member
So your brown roots on the bottom are probably not staying wet. Your system is basically an rdwc but with huge net pots and very little water for roots. The gap between the two pots should be under water 24/7 with either water fall or air stone to aerate your roots.
Or maybe you have that and I missed it?
 

TommyDumper

Member
So your brown roots on the bottom are probably not staying wet. Your system is basically an rdwc but with huge net pots and very little water for roots. The gap between the two pots should be under water 24/7 with either water fall or air stone to aerate your roots.
Or maybe you have that and I missed it?
No, I think you have it, but based on what you said, should I just set it to water more often now, so that the roots always stay wet?
 

myke

Well-Known Member
No, I think you have it, but based on what you said, should I just set it to water more often now, so that the roots always stay wet?
This will create other problems,water flowing makes a path for roots.If you ran your feed lines 24/7 your drain lines will fill with roots in no time.You need to have your bulk heads higher so theres always 4-5 inches of water,but this isnt doable.youd have to change everything.
 

myke

Well-Known Member
If you slipped a 2x4 under you drain lines between ea bucket this would raise the level.when your feed pump turns on the water will overflow and change it out.Just an idea.
 

TommyDumper

Member
the pump in the res comes on and floods the brain bucket for 15 min 3 times a day. after the timer reached 15 min it system goes to default where the drain pump switches on until the float switch stays down.
 

TommyDumper

Member
That seems to make sense. OK, so add feed lines from the top of each plant with watering rings maybe? Then set the drain pump to trigger on the current float switch all the time?
 

rkymtnman

Well-Known Member
i think you are confusing ebb and grow systems with rdwc. that is not an rdwc setup.

it's designed to work exactly how you are using it: dont' change it.

i would switch from the mycos to a sterile route myself.
 
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