Wow, thanks everyone, it's clear as ummm mud now. I guess those drip rates are drips per second? I read on The Krib that for a 90 gallon tank a 25 foot airline tube was the ticket so... I guess I'll go with 100 feet. Oh btw, the reason you put the tubing inside a dark container area is that you don't want ANY algae growing in there, it's only bacteria that we are after.
Doug
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