RRN2
Week 1	Week 2	Week 3	Week 4	Week 5	Week 6
NO3 (mg/l) 10 - 25 NO2 (mg/l) 0 GH < 3  KH 3 - 6  pH < 6.4	NO3 (mg/l) 0 NO2 (mg/l) 0 GH < 3  KH 3 - 6  pH <6.4	NO3 (mg/l)  NO2 (mg/l)  GH < 3  KH 3 - 6  pH < 6.4	NO3 (mg/l) 0 - 10 NO2 (mg/l) 0  GH 0  KH 3 - 6  pH 6.4 – 6.8	NO3 (mg/l) 0 - 10 NO2 (mg/l) 0  GH 0  KH 3 - 6  pH 6.4 – 6.8	NO3 (mg/l) 0 – 10 NO2 (mg/l) 0 GH 0  KH 3 – 6  pH 6.4