Does it have to stick in there or just kinda be hanging right in there? I couldn't get it to stick to the side of the block
Yea, Putting the cube in a cube.
Here is a shot of what I got going on now.
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At this point I water the rock wool and let the moisture transfer to the rooter.
They are on a removable rack that I dunk in a tub of water or nutes. Well not dunk.
Dip in just about a inch up, hold for a few seconds and we are good to go for a few days.
Oh, The empty one is where the thermometer probe goes. Now you got a better idea.