Looking good but what they said. I would cut down on the rockwool to 1 inch cubes and no wrap. The wrap stops side growth of roots. I got the same exact containers except a pump down in the water and 3/4 line down the middle with 1/4 inch drip line to each pot. They should do well as bubblers too.

What kind of 300 light is that ? Never heard of 300. I started with 400 HPS and went to 1000 watt hortilux. I got 3/4 pounds at harvest.

What strain or seeds are you growing ? Keep us up on the grow.

Party on.