if it aint broke dont fix it, only half applies here, as you have no control over the citys water facilitys, what leeches into your water in your house ( copper pipes might build up over time ) and if the city decideds to add a new chemical and does not inform you...
but again your tank is doing amazing, so its fine right now. but will the water be the same a year down the road?
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Two clownfish were in a tank. One says to the other, how do i drive this thing?
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