2wpg or 3wpg with co2

[EvolutionZ]

hi guys, as im reducing my lighting from 72watt on a 17gallon tank to either 36watt or 55watt.
for the 36 watt it will be 2wpg. but i would like to inject co2 to have lower pH cause im rearing crs in it.
was wondering if i can inject co2 in a 2wpg but wont get algae attack?
the flora will be lots of moss.
thanks.

[StanChung]

You do not get algae by adding CO2. Sounds fine to me. Good luck with your project!

[EvolutionZ]

thanks bro decided to go for 36watt PL. co2 will be around 1 - 1.5bps. no fert dosage..