Mig Welding gasses - Where to buy best price ?

One of the widely used
shielding gasses for MIG work is plain carbon-dioxide, or CO2. While it is in the
bottle, CO2 is really an inert gas, but technically it turns into carbon monoxide
and oxygen under the intense heat of the arc process. The oxygen can combine
with other elements in the air and in the parent metal to form undesirable oxides.
Thus, plain CO2 will not usually result in as clean a weld as with other gasses, but
it is used often because it is the least expensive shielding gas for welding steel. It
will weld very fast, with good penetration, but you should use a welding wire that
contains deoxidizing elements to counteract the effect of pure CO2.

lifted from the haynes welding manual. I use boc argoshield light , argon/co2 mix. pure argons not good either for mig. oh and a good tip , if using a clarkes fig welder , change the earth clamp for a good quality lincoln clamp from boc , costs about a tenner. difference it makes is a lot. the factory unit is a thin copper pressed item. cant handle continuse welding.

Thanks for that Aqua genius.

Oldbus brought me a new, full medium sized CO2 bottle, and the spare I got off here, will get the same treatment.... pubgas or fire extinguisher CO2 for welding.

Will deffo look at clamps and earthing, makes a huge difference.