After long bouts with multiple forms of algae in my planted 125 gallon tank along with the constant attention required, I am considering going to a smaller (55 Gallon) low-tech (no Co2) planted tank and making the 125 a Cichlid tank. Is it possible to have a healthy nearly algae free planted tank with no CO2 and T5HO lighting if I use Seachem Excel - liquid carbon? Or can someone suggest a different method of maintaining a bright lit non-CO2 aquarium? Also would I still need to dose fertilizers with T5HO lighting and no CO2? Thanks to any responding members.