Hi
I think i have a problem with my Drop checker . my lights and co2 are on for 10 hours a day and there off for 14 hours a day .but today i was looking at my drop checker just before the lights come on and it was still green and there had not been any co2 put in the tank for 14 hours .how can this be ? anyway i took the drop checker out of the tank and after about 2 hours it turned blue ( no co2 ) so this would mean that my tank is keeping 30ppm of co2 in it for 14 hours . how can that be right ?