I actually think 90% of you have no idea how well your product works :P.
To say your product is the best w/out actually conducting thorough testing is pretty ignorant IMHO. I have a feeling that most of these products are the same exact product, or very close to it with minor variations. I highly doubt any of you are noticing REAL differences in color or any other thing in your tank. Unless your using a Hanna on a regular basis, I really dont think you can say how good your product is, and that is only if you have used several diff kinds, and have kept your feeding schedules and bioload the exact same during that time.
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-Kurt
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