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09-10-2007, 02:08 AM
It is advantageous to have a transparent cyclinder like a viewtainer, but it isn't essential. The transparent cylinder lets you see what's happening inside, and lets the reactor serve as a bubble counter too. But, viewtainers are not at all made of thick plastic, so you could use half of a plastic soft drink bottle, or some other clear plastic bottle. You just have to be willing to experiment.
Hoppy
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