co2

For those using Co2... what psi are your vendors usually filling the tank at? Mine was 600 psi and trying to gage how many months a 20 lb tank will last me.

So its that time of year where the house is shutup and my PH takes a dive in the middle of the night. So I reloaded fresh CO2 absorbent to my skimmer intake and have the intake coming from outside. This really works good for a few days then its time to change the soda lime again. But to...