i dont know if i will need a remote isolation valve if i use a standard paintball bottle?

If your paintball tank has an on/off valve.. as shown in my 3.5 oz pic.. then that will be your isolation valve ...
There's another sort of valve called a pin valve... this valve is normally opened and shut by screwing the whole bottle in or out ... not acceptable... this will need a seperate isolation valve.

You can see the pin in the centre that is depressed to release the gas.



This would need an adaptor like this to push the pin and turn the bottle on/off...