pH Controllers Betta | Eheim | All Betta Eheim Betta pH Tester Pen (Tests pH 0 - pH 14) £58.75 Add To Basket Eheim pH sensor for pHcontrol+e smart controller £47.45 Add To Basket Eheim pHcontrol+e wireless pH controller only £119.49 Add To Basket Eheim pHcontrol+e wireless pH controller set £182.85 Add To Basket