Hey there weedhound. Thank you for the very informative thread here on the waterfarms. :thumbsup:I have Been using the waterfarm method for years. I run 25-30 buckets. But I use a 55 Gal res and a 32 Gal controller. I would like to do this upgrade to my system. In the past I have manually hooked up a submersible pump to pump out all of my nutrients from my buckets when I do reservoir changes just because of that lack of circulation the waterfarms have. Its a real pain to do it, making sure each bucket is drained of its old nutrient contents. Im thinking of adding a second controller to my grow. I think if I split the grow in half and operate on 2 controllers instead of the 1 it would be more efficient. Just my thought. Kinda curious of your opinion. My question is If I want to recirculate my system with 25-30 plants how big of external pump is gonna be needed. I think obviously it has to be bigger than the one made for the 8 pack up grade.

Here are some pics of my setup.






This is the air pump that powers all of the pumping columns. Very efficient and quiet. Could definitely handle more buckets if needed.
greenthumbdanny Reviewed by greenthumbdanny on . GH WATERFARM USERS: SIMPLE RECIRCULATING SYSTEM Ok so I was at my hydro store yesterday and the BRAIN pulls out this kit from GH that makes your w/f set recirculating!! Ordinarily this isn't very exciting news EXCEPT...... Get ready.......:jointsmile: It uses an air pump and drip ring set up to move the water through the system. You do NOT NEED A WATER PUMP! Let me repeat that part: YOU DO NOT NEED A WATER PUMP. IT RUNS OFF A BASIC AIR PUMP. Rating: 5