I have been advised to dose TPN+ and Easycarbo, well I know I can't get away with using a cheaper carbon source. But I was wondering if you could dose dry ferts instead of TPN+ which I feel is going to be extremely expensive. Is this is feasible I'm looking at dosing: KNO3 KN2PO4 Trace I have searched on quite a few websites and have found lots of regimes for use with high tech tanks, but none for the low tech. I think it'd be a good idea to work out a general formula. So I'm asking, would I be able to dose EI (lowered of course) in my low tech tank? And how much of each should I dose and how often? Tank Stats: Tank: 120L Approx. / 32USG / 27 UKG (60cmL X 40cmD X 60cmH) Filter: Juwel Internal Filter 600lph, Fluval 104 480lph, 8 times turnover an hour. Lighting: 2 x 24W Juwel T5s. One 'Day' (Blue) and the other Nature (Orange). 1.5WPG (US). These are actually T5HO so my lighting is pretty high. CO2: None. Will dose easycarbo. Substrate: 2cm Tetraplant Complete Substrate, 1cm Pea Gravel, 4cm Argos Playsand. Fertilisers: None, but hopefully dry ferts.