Which would produce more DO in a DWC?

JSB99

JSB99

Well-Known Member
I was a little worried that I trimmed too many leaves during flower, but the canopy is filling out fine. I'll be putting in the upper SCROG net, to support the colas, soon. Where they're rising up some will be squashed a little by the upper net, plus, the weight of the buds should sink some of the branches as well.

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JSB99

JSB99

Well-Known Member
Mmmmmmmmmm....looks tasty!
:weed::weed::weed:

This is my inside/outside Headband. I did some amateur stuff in the beginning, and was so bogged down with building the grow room that I didn't have much time to dedicate to her. I had to keep her slim enough to fit through a bedroom door. What I should have done was built a tall, vertical scrog net around the perimeter of the tote, vegged her for a few extra weeks so she got nice and tall (6' or so), while training her through the net to keep her thin, rather than wide. Oh well, this will be the only time I do this anyways.

BTW, she's wet from a fairly rainy day.

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XipXipXoom

Active Member
Have you considered not running airstones, just bare hose weighted down, due to the fact that large bubbles cause more turbulence and move the roots around a lot more, ensuring that oxygen-rich water is circulated throughout the root zone?

It's not just about having high DO in solution, it's also about delivering the oxygen to all available root surface area.
 
Budley Doright

Budley Doright

Well-Known Member
I've seen lots of root balls that die from the inside out due to lack of DO in the centre. I ditched stones years ago and now just use waterfall/fountain effect, keeping water at 66/67.
 
Jypsy Dog

Jypsy Dog

Well-Known Member
Budley Doright said:
I've seen lots of root balls that die from the inside out due to lack of DO in the centre. I ditched stones years ago and now just use waterfall/fountain effect, keeping water at 66/67.
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That makes NO sense. If O2 is Dissolved into the water, all water circulating in the solution carries O2. Unless the center is wrapped in plastic, it's getting the O2. That's like saying the center is not getting wet... And with the stone in the bottom of the bucket, the roots are also washed with O2.
 
Budley Doright

Budley Doright

Well-Known Member
Jypsy Dog said:
That makes NO sense. If O2 is Dissolved into the water, all water circulating in the solution carries O2. Unless the center is wrapped in plastic, it's getting the O2. That's like saying the center is not getting wet... And with the stone in the bottom of the bucket, the roots are also washed with O2.
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It's like saying there is no water circulation in the middle of the root ball and it gets stagnant and lacks DO.
 
JSB99

JSB99

Well-Known Member
XipXipXoom said:
Have you considered not running airstones, just bare hose weighted down, due to the fact that large bubbles cause more turbulence and move the roots around a lot more, ensuring that oxygen-rich water is circulated throughout the root zone?

It's not just about having high DO in solution, it's also about delivering the oxygen to all available root surface area.
Click to expand...
Nah, the airstones are working great. I've got one below each netpot and I'm using a 70L commercial air pump just for those four 4" cylinder airstones. They create a huge amount of air!

Plants seem to agree :mrgreen:

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Budley Doright

Budley Doright

Well-Known Member
I'm not saying there is an issue with any plants in this thread, just saying I have seen it many times, where the root ball gets so big the water stops circulating through the center, and yes it can be a SIMPLE fix, add more bubbles lol.
 
Budley Doright

Budley Doright

Well-Known Member
JSB99 said:
I have so many bubbles that there's a 1/2" plume where the bubbles reach the surface. The roots under each netpot are spread out wide, like fingers. I have no doubt that the roots are getting plenty of DO.
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It's pretty easy to spot a plant that lacks DO and yours look fine. When I see a grow here that has a flooded root zone and OP is complaining about lock out due to leaves turning white and starting to wrinkle up, 9 times out of 10 it's a root issue. And yup the biggest help is a cool res ;).
 
JSB99

JSB99

Well-Known Member
Budley Doright said:
It's pretty easy to spot a plant that lacks DO and yours look fine. When I see a grow here that has a flooded root zone and OP is complaining about lock out due to leaves turning white and starting to wrinkle up, 9 times out of 10 it's a root issue. And yup the biggest help is a cool res ;).
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Exactly!
 
JSB99

JSB99

Well-Known Member
Jypsy Dog said:
Could almost use another screen. Nice work.
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Thx, man!

I'm going to build another screen soon. It'll be to support the colas, but I may be able to squash 'em down a bit with it. I've still got a little headroom, and the light's cool at 16", where I've got it. As long as I don't burn them, I think I'll be okay.

First time I've grown in about 10 years. A little out of practice :p
 
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XipXipXoom

Active Member
Small bubbles can also get stuck/cling to the roots easier, and gaseous oxygen is of no use to roots. It has to be dissolved. Not saying you can't have healthy roots with small bubbles, just postulating the idea that large ones may, at least in some ways, be better. Airstones restrict the volume of airflow in any case. Easier maintenance with open hose, too.
Jypsy Dog said:
Could almost use another screen. Nice work.
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Not a bad idea. I saw a grow once that had 4 screens. It was all 4-5ft tall lollipops, no branches, recirculating drip in Rockwool cubes.
 
JSB99

JSB99

Well-Known Member
XipXipXoom said:
Small bubbles can also get stuck/cling to the roots easier, and gaseous oxygen is of no use to roots. It has to be dissolved. Not saying you can't have healthy roots with small bubbles, just postulating the idea that large ones may, at least in some ways, be better. Airstones restrict the volume of airflow in any case. Easier maintenance with open hose, too. Not a bad idea. I saw a grow once that had 4 screens. It was all 4-5ft tall lollipops, no branches, recirculating drip in Rockwool cubes.
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LOL! "4 screens"! Someone may need a little more practice at scrogging than myself :lol:
 
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