Once you get DWC dialed in they grow fast. Im a firm believer in LOTS of bubbles. Multible airstones keeps water & plants oxygenated. Looks like your on the right path. Good luck
I hate to piss on your picnic, but those plants dont look so good. They really need stronger light then your giving. Also only grow 1 plant per pot. Dont reduce light. Do some reading on Hortaculture.