Advice appreciated ...Large Planted Aquarium

Actually, CO2 tanks don't "blow up". CO2 tanks have a burst disk that
acts as an intentional weak point if the tank pressure goes above the rated
pressure for the tank. When a burst disk blows, it makes one hell of lot
of noise that is quite scary, but there is no explosion of any kind. The
biggest danger from a ruptured burst disk on a CO2 tank is that all the CO2
escapes at once, and CO2 is asphyxiating at high concentrations. So, if
the tank blows in a confined space (such as a car), you could suffocate.
But it is extremely rare for this to happen. For CO2, just make sure that
your tank doesn't get warmer than around 88F. If you do that, there is no
chance of the burst disk giving way.

Cheers,

Michi.

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Michi Henning Ph: +61 4 1118-2700
ZeroC, Inc. http://www.zeroc.com