I have an Aeroflo 60 with a 50 gal res. that I built a Hydrohut type canopy over. I have a 1K HPS in a Sun System Sealed hood with pass through vents and fan. I have a homebuilt CO2 Sensor/Controller that I currently have set at 400ppm. My gas cycles on for 30 seconds every 7 minutes at 400 ppm...