Thanks for the info, I will defiantly consider your advise. I just have a few more questions:
Does it matter what size co2 tank you have for a 6 gallon fluval edge?
What do you mean when the tank is 5,10,20 pounds? Is it measuring the tank weight or the gas weight?
You said that paintball tanks work the same as a co2 tank especially made for aquarium use, exept that a paintball tank usually need to have some sort of adaptor to work. What addapter is needed?
Of the co2 sizes, what size do you thing would fit in the back compartment where the filter and wires are hidden with them in use. I could always mess with the bottom plastic like cutting a hole in it to make a canister fit. I'd like to try if at all possible, to pit it back there.
Any and all posts are appreciated and welcome.
tank size is not going to matter much, the larger tanks will hold more co2, and would need to be refilled less. I am not sure about the terminology of the larger tanks. a co2 tank is a co2 tank is a co2 tank, so they are not specifically made for any application with the exception that the paintball tanks were made to fit a paintball gun. I have not had an edge, so I do not know how you are thinking of fitting it. The co2 tank will have to sit outside the aquarium no matter what. The method of diffusion would sit somewhere in the tank.
These are two specifically made to use with a paintball co2 tank.
This one would be used 24/7, you would need to watch things carefully not to gas the fish over night since plants do not uptake co2 during the night.
This one is regulated better, and comes with an electronic solenoid that can be plugged in with a timer, where the co2 gets shut off at night, and on during the day. I have this on on a 36 gal. aquarium, but will work very well on a smaller tank as well. Well worth the price in my opinion.
Any sports store should be able to fill the tank for you as well. My 20oz paintball tanks cost 3.50, but since I have it on a larger tank I need to use more co2 so the tank lasts me 1.5-2 months, on a smaller tank it would last quite a bit longer, the tank on my Fluval Flora lasts around 6-8 months.