- Alright the setup is 4x 5 gallon buckets piped by 3/4" tubing. I have a 4x4 tent with an air cooled 1000W. I'm using Fox Farms Dirty Dozen mutrients and its ran by a 900lph air pump with a 6" air stone in each bucket and the 30 gal tub in and also I have a 2600lph water pump. I'm still getting a deficiency problem somehow. I'm running the pumps and fan constantly also. Actually two fans. One up top and one at canopy height. I am using Cal-Mag+ added at around 3ml per gallon because i'm using tap water with a starting PPM of 203. I forgot to add that i'm at about Week 5 Day 6.