Originally Posted by amesdrew
If 24watts is enough, would 48watts be too much? Would I then need CO2
If you are willing to do some minimal dosing, I think you would be really happy with 48W of T5HO over a 29G. I ran a dual T5HO fixture over a 29 for awhile before going to 96W/pressurized CO2
and EI dosing. It worked really well for growing low and medium light plants. Things didn't happen too quickly, but I noticed an almost immediate difference in growth and health when I put it on the tank (vs. the single 20W T8 I had).
If you were to run just 1 6500K bulb, and 1 actinic bulb, you could still probably be successful with low light plants, though there wouldn't be much growth... but running both T5HOs would really expand your choices, without adding a lot of additional requirements. The 1 wild card here, when I had the dual T5HO setup, I was running a DIY CO2
system... so not exactly low tech. But there was no requirement for dosing PO4
, and only a minimal requirement for dosing KNO3. If you dose excel as a carbon source (rather than CO2
), and some kind of trace/potassium mix, I think you would have success.