How to get CO2 for 55 gallon

|| I've found several vendors on Ebay that will sell me a CO2 regulator,
|| a pH meter, some funky black thing whose name I forget to regulate
|| bubbles. The bundle comes out to about $250. I'll willing to spend
|| that money. My question is - where do I get CO2 tanks. I'm an EMT,
|| I
|| know where to get O2. But where does an aquarist get CO2?
||
|| Also, my water has a high pH (about 7.6-7.8). I know adding CO2
|| lowers pH which would be good for the tank. I'm now sure what my gH
|| and Kh are. Would using a peat layer underneath my gravel be
|| beneficial?
||
|| Sarah

Home brewery supply houses, makers of beer, etc... Welding supply company
can sell you tanks too

If you live in a big town, grab the yellow pages, and look for gas
companies, propane companies, etc.. that's where I get mine filled.

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is that better??