It's 2bps in a 20g tank, my mistake. I just checked our water supply and the ALKALINITY is 131 ppm and it's consistent with my test kit and the HARDNESS of 310 ppm. These were the Co2 readings, 45 bpm, PH 7.0, at 80 bpm, PH 6.8, at 100 pbm, PH 6.6, then i set it at 120-150 bpm, and it gave me 6.4-6.5, all of these readings combine with the steady reading of 130 ppm. So, with the last testing the CO2 would give me between 70-80 ppm. I have rasboras, ottos and shrimp in the tank, maybe they're tough. Hopefully, with the given advice i'll be able to contain the algae, and i can lower the CO2.
Also, the CO2 is off at night and good air and water circulation as well.