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This is gonna be interesting...

Thats insane! do you have the 500cfm connected to your light reflector? sorry for the many questions. I need to upgrade my ventilation and this info is a big help. Thank you.

Do you have a cool tube or do you just have a bunch of fans on the light? What is your ventilation setup? thanks

C_Pac , you said "5-6 inches away from the tops of the tallest plants with a fan blowing right on the light to keep it cool"... I'm curious if you have a cool tube? I have a 400 watt and i want to put it closer to my girls but am afraid to burn them. Never thought about pointing the fan...

Thank you BSI! I'll have to swing by the local hydro store tomorrow :)

Can you post the name, size and brand of your ONA jar please. Or even better, a picture of it. thank you.

Hows he progress. Got anymore pics?

AMEN! :mrgreen:

How do you use the jars? Do you just open them up and let them sit?

Hi all, I have a Sun System 5 400 HPS. If you don't know what that is, here's a picture... Sun System 5 400W Metal Halide Enclosed Grow Light - Plantlighting Hydroponics Have you guys ever taken one apart or something similar? I want to take it apart and make a cool tube out of it...

it cost me an extra $16 USD a month. Not sure about the pound conversion.

looking good. Good luck with the grow. I don't have any suggestions (im a noob) but will be watching. keep us posted.

Hey Oskiworsky, hows it working out for you? I'm in the same situation and about to be moving it to a bigger size rockwool.

Thank you guys for your help and comments but I think coco coir is not an option for me. Do you guys have a preference of clay pellets or rookwool?

Sorry if this thread already exist. I've tried doing a forum search but couldn't find anything... If it already exist, please link me to it. In your opinion, what is the best grow medium for a diy ebb&flow system? I'm using rockwool but am planning to switch to clay pellets or lava rocks. Any...