01-12-2007, 12:06 AM
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Any fish going through a LFS tank is exposed to ick while there. Because of the way store systems are set up, it is very difficult to control the spread of it at the store. If 1 fish in 1 tank has ick, then at least 1/2 of the other tanks are all exposed. The filtration systems are typically set up to run many tanks on one "system", thus, the water circulates through all of the tanks. Walmart and Petco are good examples of this. So, when you see fancy goldfish with ick, fancy guppys with fin rot, and floating fish in various tanks, the other tanks that appear healthy are all being exposed to all of these things at once.
The store where I worked, when it was built, it was with filtration problems in mind, and they individualized all of the freshwater tanks, and brackish water tanks and the filtration. Each tank was it's own seperate system, thus the exposure to these illnesses was minimal.