03-31-2007, 02:01 AM
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Also, did the filter come with it? If so, it would be a good idea to run some bleach water in it for a few days and then rinsing it all down really good again before using it for goldfish. The bleach water is safe provided you rinse it completely and let the tank air dry for a few days before using it for new fish. If the filter is used, I would replace all media, and do the bleach treatment before adding new media to it. You can run a filter without the media using the bleach water in the tank to thoroughly sterilize it safely.
In a 55 gallon, I would use 2 cups of bleach added directly to the water in the tank. This will decrease the chances of any type of illness issues from any type of contamination or previous illness issues in the tank.
There is also a product called Rydit (comes in 1 and 2) that will remove any hard water buildup that doesn't come off with the razor blade. One of them is simply more concentrated than the other, so because you are not dealing with an existing setup, I would use the more concentrated solution. You wipe it on, and mostly just wipe it off... then rinse well. Very seldom do I need a scrubbie to get rid of anything with that stuff, and it goes a long way, which makes it pretty inexpensive.