use the 5" or small airstones...you only actually need one per bucket, but 2 work better, because the more oxy the better.

buy gh 3- part and use it 5-5-5 for veg and 4-8-12 for bloom* 3 ml per gallon calmag+. LK as directed every 2-3 rez changes.
*values are each part per gallon g-m-b. This recipe works awesome in a bubble bucket...I will show you a couple of piks of mine in a simple bucket.

NYCD in front and Fantasma(AKx) backleft. Both plant are in a 5 gallon bubblerm with 1 airstone and I used: gh 3-part, calmag+, liquid Karma or sea blast for B-vits and catalyst.

these are in the beginning of wk4f...This entire grow is under a 1000w MH agrosun gold. I wired ballasts** myself and whole lighting unit (ballast, lamp, hardware, and box) cost me under 200 bucks, including a ballast box from bghydro.

**I have wiring step-by-step in growfaqs. Although that is and hps s-b-s...I might be persuaded to do a MH ballast hook-up, but they are the same, except MH does not use an igniter like hps...peace