RDWC setup (thoughts opinions)

Cold$moke

Cold$moke

Well-Known Member
Airwalker16 said:
Root zone and plant foliage growth are two completely different things as far as temperature is concerned.
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Id love to see a link cause i specifically
Rember reading some wher about peak plant metabolism when the roots where at a warmer temp :)

Real science though please
 
rkymtnman

rkymtnman

Well-Known Member
Cold$moke said:
you can find the science on this
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plese post your links.

let's say that your water temps are 65. only half the roots are in the water anyways. the roots from the stem to the water line are suspended in the air and would be closer to whatever temp the top of the tote is.
 
Cold$moke

Cold$moke

Well-Known Member
I dont need to search ive already read it

Just google best root temperature for maximum growth they all pop up from there :)
rkymtnman said:
plese post your links.

let's say that your water temps are 65. only half the roots are in the water anyways. the roots from the stem to the water line are suspended in the air and would be closer to whatever temp the top of the tote is.
Click to expand...
 
Cold$moke

Cold$moke

Well-Known Member
Remember hydro has been around for quite a while and smart people tested all this stuff before :)

Not saying anything bad or demeaning either
Cause im sure no genius:)
 
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Cold$moke

Cold$moke

Well-Known Member
rkymtnman said:
plese post your links.

let's say that your water temps are 65. only half the roots are in the water anyways. the roots from the stem to the water line are suspended in the air and would be closer to whatever temp the top of the tote is.
Click to expand...
Also look up kratky method of hydroponics

So are you saying that half of the roots in cold water and half in warmer air is the best of both worlds. Mabey i could see that .

But why would i pay to chill just for a few degrees if the do level is very close between 67 and 72?

But i wouldnt argue with people with phds in plant biology :)
 
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grisbi

grisbi

Well-Known Member
so the o2 grow is working if i read some guyz here? just need to put it on 2/4h /day, i like this solution because its silencious!!
juste have to take the 6 emitter version for my 6 x 8 gallons bucket rdwc wanna make : https://www.o2grow.com/spider.php
hope this will work! :D
 
Cold$moke

Cold$moke

Well-Known Member
Again i say there isnt enough difference in dissolved oxygen
At the 2 temps to pay to stay a few degrees cooler .

But as usual im not a scientist or botanist
 
Airwalker16

Airwalker16

Well-Known Member
Cold$moke said:
Again i say there isnt enough difference in dissolved oxygen
At the 2 temps to pay to stay a few degrees cooler .

But as usual im not a scientist or botanist
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Rofl. You know the maximum number is 14 right? It’s a difference of like 8-10%. It’s well worth it.
 
Cold$moke

Cold$moke

Well-Known Member
Airwalker16 said:
Rofl. You know the maximum number is 14 right? It’s a difference of like 8-10%. It’s well worth it.
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Holy fuck dude yea i know its 14 but what temp is the water at 14 dude?

Like i said edit your graph to show the actual usable water temp by plants which is 65 to 72 :)

Waters dissovled oxygen level based on temp

Hence when you boil water you see bubbles thats the oxygen leaving

But you cant give your plant 0 degree water Duh

Look at your OWN GRAPH!

:wall:
 
H

HydroEnthused

Active Member
Cold$moke said:
True but not for plant growth :)

I guess i have to dig up those dissovled oxygen test results again lol
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In my DWC rooms I’ve had the best results with 75f water, 84f at the canopy height, 77f at the main stem base.

So I agree with Cold$moke that it doesn’t pay to use a chiller to make it a few degrees cooler if his water is hovering around 75f.

65f water gave me the worst results that I’ve ever had in the past 3 years. Downright stunted. In two side by side rooms that water temp greatly reduced yield with all other temps and EC within range. 600 watt lamps were only used twice also and the yield was still brought down tremendously.
I only went that low (65f water)with 2 side by side runs but I’ll never do it again.
Oh, I go big, by the way. Very
 
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