Join Date: Jun 2007
Location: Honolulu, Hawaii
That's interesting about shutting off the co2 at 7:45 and it still diffuses for 3 hours. I gotta test it on my tanks to see if i can cut off the co2 earlier as well. saving 3 hours of co2 per day sounds pretty good to me.
As for the HC, I just trim it once a week~ But I think others may recommend to aggressively trim it...