royalgreen
Well-Known Member
hey everyone i was hoping that some one could tell me the proper gph for a 75sitevinyl post hydro unit, with a vertical of 7ft head.this is a stadium grow.4 levels each level with little over 15 site's per level. i have had ppl tell me that i could do this with 400gph but after reading a few threads im not so sure...don't wonna spend money on somthing when im just going to take it back...any help would be great
