Ph problems with my waterfarm kit@HELP@

[stompnu88]

Im a newbie with this GH Waterfarm setup and keep having problems with my Ph levels. My upper res Ph levels are fine but my Btm res and pots Ph keeps jumping up high. Can anyone give me some advice please????

 

[supermanlives]

make it recirculate. when i ran waterfarms the nutes and ph was all different in buckets. then i started recirculating it and my problems went away.