no...keep water below netpot...bubbles will wet medium plenty...If you submerge roots when young and weak, they will drown.

Yes, you can put seed in rapid rooter and right into bubbler, mist daily, plant will grow.

I have done alot of dwc experiment's with and without netpot's, but I love rapid rooters; Because you can place them anywhere you want...and without some of the hassles of rockwool.

I just germed a couple of c99xNL5 in Rapid rooters and after they showed roots...I placed them in 5" netpots filled with hydroton.

here are 3 pix from new grow report I am working on c99xNL5...It show putting rapid rooter into hydroton...

hope this answers your query. lw