Need help , i'm a beginner grower

[thunderdome]

Hi everyone ! I need to know your opinion. I'm building my first dwc system , purchased 27 gallons container for that. Planning to try 4 plants.
What net pot size should i choose 3,4,5,6" ?

I decided to buy Active Aqua air pump, and i also need to choose air stones, i found bubble disks in different diameter, is it a good idea to buy 4 outlet air pump and connect 2 outlets to a disk like that so i will have 2 disks total? I was thinking about 6" disks.

Please tell what you think

[HappyDaze]

I have an EcoAir 8 outlet pump that I use with a 25 gallon DWC setup using two 4" diameter air stones. I do exactly what you suggested and tee two outlets together to each air stone. The added back-pressure you get when you're delivering a lot of air to a relatively small stone means there's a lot of surface tension in the bubbles, which maximizes CO2 exchange. I like having the extra outlets available from the 8 outlets for aerating nutes and running extra buckets of clones.

I used to have a whole bunch of single and dual outlet pumps and they were always tangled together in a mass of hose and wires. One big pump works better for me.