Some people use a 396 GPH for 28 EZ clone misters. Think that might be enough? Hope so. Cause those are only 18 bucks, but going up to 720 becomes $160. Btw i am will be using one for 5 pieces of 2'8" 6 inch pvc pipe rails, with 1/2 inch pvc with misters screwed into it running inside the pipe. I will be building 3 systems for a 3 week perpetual harvest, to allow for maximum production yet stay within legal limits. There will be 75 plant sites. Thus 150 misters