What a coincidence since I just posted in another thread that my attorney wife does not approve of me posting pictures. But what she doesn't know won't hurt her, now and then anyway. This was taken this am, these are 21 days today. The 2 on the right are OG Kush and the 2 on the left Barney's Farm LSD (there's a variety of highs). The OG are definitely more bushy but not as much as this picture makes it seem, The plant in the rear right is so large horizontally that the one in front of it has begun leaning forward toward the camera so you are seeing more breadth of leaf. They are on Humboldt nutes and have never been hand watered or fed with any tube or drip since germination.
Shitload of bubbles would be it. Enough that when you hold your hand a couple inches above the water you can feel them breaking. Then set water level an inch or two below the bottoms of the netpots. You can control how wet your rockwool or whatever gets by raising or lowering water level. The "comparisons" you see mentioned are set up for failure by having inadequate bubble action. When I first tried this I got paranoid and top watered and got stem rot. Since then I load a netpot with hydroton and a rapid rooter but no seed. I can easily pull and check it, but by now I pretty much have it dialed in. The pump is important, I use this:
