Hey guys, i am using EJ natural pH up and down for my 25 gal ebb and flow rez. The pH fluctuates a decent amount with nothing but tap water that was left to sit out. Any ideas why this is? Maybe its because i didnt rinse my hydroton well enough...
your supposed to soak your hydrotron in ph4.0 water before using them, or so i've heard . personally i've never used them...