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Has anyone used a CO2 system like this yet?

http://www.dtpetsupplies.com/catalog/Co2-Equipment/CO2-Systems/Red-Sea-CO2-Pro-System-DELUXE-for-PAINTBALL-CO2-cylinders-CO2-cylinder-not-included/

http://www.dtpetsupplies.com/catalog/Co2-Equipment/Co2-Accessories/CO2-Tanks-Cylinders/20-oz-CO2-Cylinder-with-Pin-Valve-This-is-a-paintball-style-CO2-cylinder/

http://www.dtpetsupplies.com/catalog/Digital-Instruments/Monitors-Controllers/Ph-Monitors-Controllers/Milwaukee-pH-Controller-Includes-pH-probe/

Really compact. I would probably feel a little safer with little paintball CO2 tanks rather than a big huge CO2 tank that you have to lug around. Supposed to be good up to 125gal+. I hear you can get it refilled easily at W-Mart or local sport shops. Wont have to call around and pester the restaurant supply shops. Get the monitor/controller to keep your fishies safe from CO2 causing Ph to drop to far.

I might decide to set up a big planted tank again. I used to have a 75gal planted, but I have reduced because of upkeep requirements. Just have to decide if I want to shell out the and where to hang the VHO lighting (and if I can get the bulbs I want) above my 120.