I'm also building bubble systems to run next to my aero buckets. the 70 l/per minute pump is the one i just bought off ebay after a day of reading on the best possibilities. large round air stones or 2 of the fish type per bucket is also recommented. I kick my own ass for not just going all bubbles, but if this auto thing is not what i expect, its back to clones and a flow table. I have 30 seeds for photo, BB, BG, and some white. to start around the room during the experment with the atuos. when the autos are done, the mothers will be ready to sex and clone. I'll be adding lights as i go and see how the LED works compared to the MH/HPS so i'll know which lighting to add as these grow. small room (8x10) but pinning the mothers against the wall and adding the lights above the main lights it should work out. good luck on your new bubbler system!!