Slow growth in my DWC tub

[black_thumb]

i trans planted my clones into my dwc tub 10 days ago and they are growing really slow. my ph is stable @ 5.8 water temp 70 f. im using 8 1" air stones with a 40 lpm air pump ppms @ 800.

i have the water level 1" below the bottom of the netcup should i raise the water level? maybe a bigger pump?

 

[bicyclebenny]

I keep the water level at the bottom of the netpot 'til they show some new growth, then lower it gradually; works for me. YMMV

 

[Cloneman]

I have mine 1 inch up the net pot with the clones (rockwool cubes) 1 inch above that, all the way through the grow.

Good luck

Edit: read this especially posts 272 and 285 from billy liar and DHF ...... https://www.icmag.com/ic/showthread.php?t=181239&page=19

 

[tricky1]

Read this: https://www.icmag.com/ic/showthread.php?p=3838091#post3838091

 

[halitzor]

PPM too high and lid not light proof. Id start there.

 

[jm420]

agreed on the ppm,I keep the water at the bottom of cups at that age ,Not enough rootmass yrt for an air gap

 

[black_thumb]

i painted the lid black than over with white theres no light getting in there.

I'v lowered the ppms down to 600 and raised the water level right up to the bottom of the net cups. i hope this does the trick.

 

[HempAlchemist]

already stated, but in your 1st pic it looks like there are holes that light can hit the rez along the perimeter of your tub. your last post says there are no light leeks looks like that is fixed. but what i see in the second pic might be what's causing the problem.
it looks like your roots are browning, which to me, says you have some sort of root slime starting. is this the case, are your roots starting to build up slime? a lil H2O2 in the rez will help clean that up if thats the case.
also what strain are you running?
what nutes are you using?
what kind of water are you using?

 

[black_thumb]

already stated, but in your 1st pic it looks like there are holes that light can hit the rez along the perimeter of your tub. your last post says there are no light leeks looks like that is fixed. but what i see in the second pic might be what's causing the problem.
it looks like your roots are browning, which to me, says you have some sort of root slime starting. is this the case, are your roots starting to build up slime? a lil H2O2 in the rez will help clean that up if thats the case.
also what strain are you running?
what nutes are you using?
what kind of water are you using?

\

thanks for cheecking out my post i dont thank i have any slim on the roots but i do have some h2o2 ill throw in just in case.

im using tap water @125 ppm
the strain is chronic i have them under a 250 MH
and feeding them pbp and cal-mag plus.

 

[Widow Maker]

hey buddy. we are using the same tub haha. I would definitely get some lightproof plastic (grow shops sell it) and put that over the top. The cover on our tub is not light proof and if light is hitting roots thats never good. Good luck!

 

[HempAlchemist]

should have stated in last post but H2O2 is normally use at 1teaspoon/gal (5ml/4l)
125ppm tap is nice! wish mine was like that, my tap comes out around 350ppm
from what i remember Chronic is a good feeder, so doesnt look like its a feeding issue.
were the roots that developed when you put them in the tub? it could be that the plant is still getting enough roots into the rez to take advantage of being in hydro? maybe give them a couple more days to allow the roots to get longer and you should start to see an explosion of growth.

keep us posted
HA

 

[black_thumb]

Okay its been 4 days now and the roots have stoped growing ever since i raised the water level to the bottom of the netcups ph is still stable at 5.8 ppm are now around 650 water temps are 68-70.

what the hell am i doing worng?

 

[Blunt_69]

Your ppm is still to high. you haven't light-proofed the box.your temps are to high

 

[black_thumb]

okay lowerd ppms to 400 installed water chiller set to 55 F, light proofed the tub. now lets see what happens.

 

[black_thumb]

i also lowered the water level back to 1" below the bottom of the netcup.

 

[Scrogerman]

55f is way way too low bro. minimium is 65f really bro, growth is gonna slow right down if ya got cold roots, especially while they are in this early a stage & the arse is drop right out of the available D'O(dissolved O2) Levels!. Make sure what roots you see coming out the bottom of the netpots are actually in the solution or your gonna get a growth stall, use a water heater to get temps to 65-70 if you have to. also i find using a weak npk nute line like Ionic very usefull for young/new clones & seedlings, they love the stuff. I find veg nutes with higher NPK ratio harder on newlings, a plant start or weaker NPK nute line works much better, ive even found youngs starts stalling from using full veg nutes(EC0.4-0.6). You want an EC of about 0.4-0.6 to start off with & watch & chart your PH & EC from there. Your on Soft water with a ppm like that too, like me, i have lovely tap to work with(For Hydro). Use OXY+ & get that water level right up. what is that dark looking stuff in your net pots, the stuff in with the hydroton? doesnt look right to me. dont use the h2o2 with any organic additive, thats ones included in your nutes remember. thats why i like the Ionic, it works really well with H2O2. G'Luck!

keep your water level high bro, untill its well established anyway. As many roots in solution as you can get, why did you lower the water level? did i miss something?.

 

[black_thumb]

i was getting some growth but slow, with a 1" air gap below the netcup. than i was told to raised the water level to just under the netcup so i did and 4 days all the root growth stoped' look at the pics from my first post and compaire them to the current pics and you will see there is no new root growth.

i had my ppm around 650 and was told to lower them, so i did to 400. now they are showing some yellowing.

i had my water temps set to 68-70 F and was told that was to hot so i lowerd them to 55-60 F.

now im confused.

the plants in the tub are now on day 15 from clone and only 4-6" tall whille the clones that where put into coco are 15" tall. although under 600 watt hps.

 

[SKUNK420]

I've been using those same tubs for over 5 years never had light leak problems causing root rot or preventing new clone transplants from growing roots. Yes eventually block the light out or veg the hell out of them to shade the lids. This is the first time I covered my lids with heavy duty trash bags. I may use it on the next one or may not. For me I don't see it as a factor that's messing up my system.

I suggest you let it ride, you seem to have the water temp and pH in check. Get the water temps back up to no lower then 65-68. Keep the ppm's around 300 to 400 @ 0.5 conversion until they get bigger. After that keep it around 500 during veg or depending on how they look adjust as need be. Keep the water level close to the bottom of the pots so the mist from the popping bubbles will get enough water on the medium until the roots start hanging in the water then lower it accordingly. It seems that you had it on the right track and then you raised the water level which total soaked the rockwool in the net pot and it browned out your roots. My current grow has had water temps as high as 78 during the summer. I don't suggest everybody do the same but it's to let you know that it can be done when other conditions are permitting. I use GH flora series and no organic additives, I feel that has helped in preventing root rot. Using Floralious+ in the past has been a game of Russian roulette root rot for me so I don't using it anymore.
I think what you also want to hear is this, from the time I transplanted them it took about 4 to 5 days before I could see new growth.
You said your only using 250watts so growth will not be as fast as mine but it just give you an idea of how fast your dwc such/might grow.

here check this out from the start. :
https://www.icmag.com/modules/Journal/viewentry.php?journalid=798

Oh yeah I remember now why i used the black trash bags. My tubs were set up for SOG up to 15 per tub. I had to plug/cover the unused holes.

 

[Scrogerman]

who ever is telling you to lower solution temps to 50-60 is talking outta there ass, thats way too cold for roots, thats not only gonna slow growth to a crawl but drop the ass out of D'O levels & you know thats pretty important in DWC. optimal temp in DWC is 68f imo, the actual safe range is 65-75f but i dont like to go over 72f, 68-70f was optimal. Roots: clones & seedlings alike need the water level high so new roots have immediate access to nutes, v-important under HID lighting. Keep the level just under the nets untill you have a more established rootball. 400ppms(.5 or .7 con?), mmm ok, but work in EC if you can, you want around EC0.6+ at this stage so you aint far off im sure. be patient man & watch new root growth, it should take off if its sitting in the solution, like i said i like to use a low NPK nute line at this stage, found it also helps, ar you using a root stim? rhizotonic or similar, may help.

Its imperitive you raise Res temps to 68-70f! otherwise growth is gonna crawl, even stop!
65 would be OK but its low, thats as low as i'd ever go, 72f being the highest! you had that bit right in the first place bro!

 

[BigGreen]

Dude keep your water at 68f and keep your ppm low right now they will start kicking soon