Which would produce more DO in a DWC?

Cold$moke

Cold$moke

Well-Known Member
JSB99 said:
I had to work to get the duct sleeve through the porthole though. How flexible is the insulated duct you use?
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The one i came up with the spray foam i have no idea as i didnt try it yet ;)

I imagine it would be stiff till you forced it into a shape the foam may crack on the inside but its purpose is just to keep the inner duct centered
Tape and silicone would airseal the ends when you attach it (all theoretical of coures)

And i basically have banished flex pipe from my lands lol

I only hard pipe now and i use rigid board around it then i foam and caulk everything :)

Cause i dont need air cooled hoods anymore
But i understand you have no choice. Cause you need that adjustable height for your hood

I think you did a good job ,ive never seen you really hack anything yet ;)
And i would have done the same.

The spray foam idea is just an idea but would probably be the next step if the first idea failed
If it was me
 
JSB99

JSB99

Well-Known Member
The Girl Scout Crack in the back-left is still trying to outgrow the others. I've already supercroped her pretty good, but she still stands a little tall. So instead of messing with her anymore, I slid the tent poles the light is hanging from, forward and to the right, so that more light is concentrated over the shorter plants. The tall one still gets plenty of light though. Normally I'd grow all the same strain so that they're level with each other. They are all between 70,000 and 85,000 lumens at the canopies.

PSX_20180327_112709-3120x2340.jpg

PSX_20180327_112731-3120x2340.jpg

A while ago I added extra poles to the tent ceiling so that I had extra hanging points. This also makes the tent and frame much more sturdy. It's easy to add them. Just use PVC pipe, drill holes in the ends, and use zip ties to secure them to the existing frame.

PSX_20180327_112746-3120x2340.jpg
 
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JSB99

JSB99

Well-Known Member
Cold$moke said:
The one i came up with the spray foam i have no idea as i didnt try it yet ;)

I imagine it would be stiff till you forced it into a shape the foam may crack on the inside but its purpose is just to keep the inner duct centered
Tape and silicone would airseal the ends when you attach it (all theoretical of coures)

And i basically have banished flex pipe from my lands lol

I only hard pipe now and i use rigid board around it then i foam and caulk everything :)

Cause i dont need air cooled hoods anymore
But i understand you have no choice. Cause you need that adjustable height for your hood

I think you did a good job ,ive never seen you really hack anything yet ;)
And i would have done the same.

The spray foam idea is just an idea but would probably be the next step if the first idea failed
If it was me
Click to expand...
I'm thinking of using rigid pipe going from the floor to the tent intake, as well as from the exhaust fan to the ceiling. I've kicked the intake duct a few times, and poked a couple holes in it while trimming. The rigid pipe will really help with that. I imagine it'd be a little more quiet and efficient, given that the ridges around flexible duct causes turbulence.
 
SSGrower

SSGrower

Well-Known Member
JSB99 said:
I'm thinking of using rigid pipe going from the floor to the tent intake, as well as from the exhaust fan to the ceiling. I've kicked the intake duct a few times, and poked a couple holes in it while trimming. The rigid pipe will really help with that. I imagine it'd be a little more quiet and efficient, given that the ridges around flexible duct causes turbulence.
Click to expand...
The smooth inner surface makes a real difference when talking runs of 15 ft or more, also on the negative pressure side you loose diameter with flex, use long radius elbows to reduce friction loss.
 
JSB99

JSB99

Well-Known Member
SSGrower said:
The smooth inner surface makes a real difference when talking runs of 15 ft or more, also on the negative pressure side you loose diameter with flex, use long radius elbows to reduce friction loss.
Click to expand...
Do you use rigid aluminum pipes, or PVC?
 
PetFlora

PetFlora

Well-Known Member
IMHO, you only need DO during the feeding cycle, AND roots benefit from a pause cycle

Enter my new technique: low pressure aero in shallow water (just enough to cover the lp pump). Great news for this technique is bottom uptake pumps are readily available AND reasonable, plus, they would cut the nutrient use in half. Im running ~ 3 minutes on and 30-60 minutes off. This depends on how many plants, mist heads...

anyway, it broke my heart, but I had to pull 2 males yesterday, They were pretty big for being less than a month old from seed

So far, 2/4 left have pistils, the other 2 likely females considering they haven't sexed yet, but they are all small, and the 2 that haven't sexed yet, smaller still; none of them were getting adequate misting, so they're stunted.

This is first my attempt. Adjusting on the fly. I now have a new mist head/PVC design, and am using a side feed pump. Now that I think of it, because the bottom draw pump only needs ~ 1/2 the solution than that of the side feed pump, which also requires more nutes for headroom. Another revelation: this also means fewer blue ice pack rotations each day and easier to maintain stable temps. I'll be switching that pump out tomorrow!

Pic of biggest plant after I moved it outside and roughly 1/2 section of the roots

plus roots under the hood, and a shot of whats left

hth
 

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JSB99

JSB99

Well-Known Member
PetFlora said:
IMHO, you only need DO during the feeding cycle, AND roots benefit from a pause cycle

Enter my new technique: low pressure aero in shallow water (just enough to cover the lp pump). Great news for this technique is bottom uptake pumps are readily available AND reasonable, plus, they would cut the nutrient use in half. Im running ~ 3 minutes on and 30-60 minutes off. This depends on how many plants, mist heads...

anyway, it broke my heart, but I had to pull 2 males yesterday, They were pretty big for being less than a month old from seed

So far, 2/4 left have pistils, the other 2 likely females considering they haven't sexed yet, but they are all small, and the 2 that haven't sexed yet, smaller still; none of them were getting adequate misting, so they're stunted.

This is first my attempt. Adjusting on the fly. I now have a new mist head/PVC design, and am using a side feed pump. Now that I think of it, because the bottom draw pump only needs ~ 1/2 the solution than that of the side feed pump, which also requires more nutes for headroom. Another revelation: this also means fewer blue ice pack rotations each day and easier to maintain stable temps. I'll be switching that pump out tomorrow!

Pic of biggest plant after I moved it outside and roughly 1/2 section of the roots

plus roots under the hood, and a shot of whats left

hth
Click to expand...
Did you mean to post this in my thread? Seems a little off-topic.
 
Budley Doright

Budley Doright

Well-Known Member
Seeings how he’s halfway through the grow it’s a bit irrelevant .... kind of lol. You really need to start a thread though, they r impressive roots but the plants don’t seem to be doing that well :(.
 
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