I currently am using a pressurized tank to inject co2 into my tank. I was
wondering what was the safest or most effective pounds of pressure that
should be released. I was running it at 20 but i have cut it down to 15 and
seem to be using less co2. But i also heard that at these low levels my
dual guage will break quickly. I s this true?

Another question i was wondering about is when is a good time to fertilize.
Is it true that you shouldnt fertilize right after a water change. I was
fertilizing after water changes and every time i would get green water. I
was wondering if it was from this or from the lil sun light that pokes its
head through the window.

And one more question for the road. those anyone know of a very good (user
tested) reactor that enables the co2 to get into teh water column
efficiently. I am looking for a small reactor...not a diffuser (if you
think i should get a diffuser please give me some reasons). Also what are
good co2 indicators that you can see at a glance in the tank?

Thank you