Hey, I have a small 5.5g planted tank (2x15w CF bulbs for 5.4wpg) but don't use CO2. I use Excel instead for my carbon source. The EI method suggests that you should have 30ppm of CO2, but since I'm only using Excel will it still work out? Right now I'm dosing double the recommended amount of Excel (1ml per day) and growth has been decent, but not great so far. I have my macro nutrients ready to start dosing though (KNO3, KH2PO4, K2SO4). Should I continue with the 1ml of Excel per day, or will I be short on carbon causing an algae outbreak? Thanks.