as long as you have an airstone running, they are good to sit in the water.
I use a 6 inch marina elite airstone
that one is pretty lanky, i never have grown lanky ones. if you were to plant in soil or a bigger netcup, so it comes up 3 inches below the leaves it would be fine maybe. but lanky will not support big growth as it will fall over. its young so you will know in a couple weeks. I would still pop some just in case.
they grew in rockwool for first week or two (cant remember), until roots started coming out, then i moved to the tote. no nutes until it was in the tote and roots were down below netcup
im using advanced nutrients ph perfect micro, grow, bloom. i followed what their calc said, for 8 liters, started with 8ml of each.
by the calc, week one should be 8ml , week two 16ml, week three 32ml
however, I am still at 16ml. I will go to 32ml tomorrow when I change the water out.
I have been changing every 2 weeks, so twice so far, initial fill with 8ml per and then 16ml per two weeks ago.
I will be going to 32ml tomorrow for the third round. after that , its 32ml the rest of the way (if I stay with 3gal, which I probably wont be for flowering, althought i may just get a 3gal bucket and put the big one by itself and flower in that.)
the big one it getting too big, so since I took clones today, will probably grow another 2 weeks (til I see the clones have rooted) then will flower it. its in a 2x2x3 now, so I cant go too big (its over a foot tall now). I will be gettign a new veg tent, probably 2x4x5. then I got a 3x3 for flowering.
here is some root pics, i did switch the front two so the ak is on the left front, auto on the right.
also, pix of the dwc cloner I just made this week.
wasnt planning on using a dome, but figured I would. so since I dont have a larger dome, i decided to cut out a 10x20 tray so the dome would fit. now that i look at the pic, i might be able to use without the tray, I never tried it lol