If you think about it, DD and LA must have Ich, Velvet, and Uronema in their systems, as would any large volume retailer. Because once in, you can't get rid of Uronema, and to get rid of ich and velvet you would have to go without fish for almost 2 months. Running low levels of copper might keep the symptoms under control, but that isn't the same as eradication. So if you think they don't have all three diseases in their systems then you believe either:
(1) of the hundreds of thousands of fish that come through their systems, none ever had those diseases
(2) they prophylactic treat for these diseases with 100% success rate (their website says they don't)
(3) they periodically run whole systems fallow for months, and in the case of Uronema, go even further and drain/sanitize their systems and then re-fill and cycle them.
#2 and #3 are wildly unfeasable for them or any large volume retailer. I consider any fish that makes it through their system (or any other - don't want to single out LA here) without picking up one of those diseases very lucky.
(1) of the hundreds of thousands of fish that come through their systems, none ever had those diseases
(2) they prophylactic treat for these diseases with 100% success rate (their website says they don't)
(3) they periodically run whole systems fallow for months, and in the case of Uronema, go even further and drain/sanitize their systems and then re-fill and cycle them.
#2 and #3 are wildly unfeasable for them or any large volume retailer. I consider any fish that makes it through their system (or any other - don't want to single out LA here) without picking up one of those diseases very lucky.
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