lusidghost
Well-Known Member
You can also take the wrap off of the blocks. It’s really only there to prevent light from causing algae. If there’s enough humidity the roots will wile out.
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- Thread starter DavieBhoy76
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DavieBhoy76
New Member
Nice
Nice I'll give them a try thanksI'm not sue about black mold, but you should cover the rockwool to prevent algae. Especially if you aren't top feeding them. Aluminum foil works I guess, but Panda Film is good stuff.
Amazon.com: HFS (R Black and White Panda Film 5.5 Mil Poly Film (10X25FT): Garden & Outdoor
Amazon.com: HFS (R Black and White Panda Film 5.5 Mil Poly Film (10X25FT): Garden & Outdoorwww.amazon.com
I think I'm the only person on the forum to use coco cubes, but I really like them and they would work well with your setup.
GroEzy 6" Coco Grow Cube 32 units - The Coco Depot
Our Patent-pending products are designed to optimize your grow operations. A great option for growers looking for rockwool and switch to coco.The compressed blocks once hydrated fill the fabric pot and becomes a ready-to-use cube. We use premium coco grow media triple washed, EC below 0.5...floridagardensupplies.com
lusidghost
Well-Known Member
This isn’t a great picture and these were young plants. but you can see what happens to the roots when they become exposed in the dark. 
Rdubz
Well-Known Member
Wait why do the tips look burned?
lusidghost
Well-Known Member
That's where they started drying out. If I had laid a coco mat underneath that wouldn't have happened.
lusidghost
Well-Known Member
Rdubz
Well-Known Member
Ok ok I understand now ! So how the hell do air pruning pots work? I guess I'm trying to understand the difference maybe they where getting water outside your mat for a little while keeping them alive and then they dry and do that ? Isn't there a way to have the same concept with the airpots that have air pruning?
Rdubz
Well-Known Member
Sorry brain fart just thought of it lol if there is no water on the other side then that's how it works !
lusidghost
Well-Known Member
I think "air pruning" is really "light pruning." They love humid dark air. Those rockwool slabs were in the trays under panda film. I top fed them and drained the waste. The roots grew out until they got too far from the moisture. That's why there was a mass of them in the draining channels. It stayed extra moist underneath.
Johnny Lawrence
Well-Known Member
FYI
If you're going to stick with rockwool, Grodan makes those slabls that come covered and are designed with trays in mind, like you're running. You could eliminate all of that aluminum foil. It'll clean up the look of your setup and allow you to work more efficiently.
I might have missed it on page 1 - Is this flood and drain? drain to waste?
If you're going to stick with rockwool, Grodan makes those slabls that come covered and are designed with trays in mind, like you're running. You could eliminate all of that aluminum foil. It'll clean up the look of your setup and allow you to work more efficiently.
I might have missed it on page 1 - Is this flood and drain? drain to waste?
lusidghost
Well-Known Member
Rockwool slabs suck. Especially if you leave them in the wrapper. They don’t wick well, so you get dead spots that stay dry.