They work. When I had one on my large aquarium I could totally redo all the
entire tank and change all the filter media and not worry about ammonia. I
removed it and placed it on another tank and now I when I change 20% of
anything I see spikes.


"Carl Beyer" wrote in message
...
Wanted to hear thoughts / results. Considering it for my 400 gallon
pond. I have heard great things...

Carl Beyer

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http://www.cobaltbluefilms.com