:five:I was about to post that if its in or out of the bucket ...its prob not going to be enough air .Ideally you would have 30lpm (liters of air per min) going into each bucket .If your looking to grow BIG plants a small pump wont do the job mate .. check this thread ... https://www.autoflower.org/f61/help-me-figure-out-my-feed-anyone-21000.html.
the hailea super silent v-30 for 1 bucket or the v-60 for two is perfect... dman does good with 20lpm so thats fine as well ! .Im guessing by choosing DWC your after big girls ?.If so I recommend these !.
you should start a grow journal Cap ... get all the help you need in 1 place ect :group:
That's exactly the pump I've got the hailea super silent v-20,get a v-20 and grow a monster