so my question is this, he says the bottle is high pressure and the reg is HP, so how do i go about stepping that down to something I can use in my tank? can i use that HP reg? or should i ditch it and buy a LP reg?
Take a picture of said regulator, or get the information of the regulator (i.e. make, model number, etc).
A regulator first steps down the tank pressure to a more workable pressure. This is then stepped down again by a needle valve.
also all the lines, fittings coming off the reg are 1/2", can I just use a barbed fitting to step it from 1/2" to the size of aquarium tubing (which I really dont know the standard size) you know the normal tubing you buy at your LFS.
Yes, you can use brass fittings to step down from the 1/2" fitting to an appropriately sized one.
next is the question of a solenoid and bubble counter........its my understanding it goes tank---->reg---->solenoid---->bubble counter---->into tank to diffuser....correct?
You are missing the needle valve immediately after the solenoid and before the bubble counter, but other than this, it is correct.
basically if i cant use the reg he got me, i can still use the tank, which saves me like $100 or more! right? lol
and 20lb of CO2.......im thinking thats gonna last for a really long time....correct?
Depends on what size of a tank you are using it on, how many tanks you intend to use it on, how fast your bubble rate is, and whether or not you have any leaks to start off with.
yeah, i will post pictures, as soon as i go pick it up. going to get the stuff on friday. i assume from what he has told me that its 60-160, but idk, we will see when i pick it up.
If the low pressure gauge measures from 60-160, then you will likely need to get another regulator, as the preferred delivery pressure is ~15-30 PSI.