Dont adjust the water before you add nuts.. the nuts will throw the ph abit of ballance. 5,5 is at low end, not suitble unless you are running hydro... tho 5,5-6,5 should be your range anyway. lemon will balance the ph for a short time bc its not a good buffer.. Try to keep in in that range, you might have to calibrate 1-2 times aday until u get a better buffer. My advice is as always canna ph-
- TT