Hello,

I kept my seedlings in a vermiculite perlite mixture until they had one to two inch roots coming out of their rockwool cubes.

I then placed them into my hydro setup (DWC). I set the water level so that it was about 1/2 inch to 1 inch below the bottom of the rockwool cube. I left the water level there until I could see roots growing out of the net pot into the water.

I gave the seedlings two weeks (aprox.) of nute free water. Then I started them off with a 1/4 strength mixture of nutes. I would strongly recommend following the directions on the back of your bottle. If they do not have a seedling mixture ratio take the smallest normal ratio they have and divide it.

Take care

Peace