Originally Posted by GouramiCichlid
How do I check my water supply? Do I leave water sitting out for a day
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You can test it straight from the tap. I would also test DI
water if you have any. Perform ammonia and nitrate tests on tank water, tap water, and DI
water. The latter two should give you zeros although the presence of ammonia and/or nitrate in tap water can occur. The DI
water is not necessary but it's nice to have a negative control (even if you use it only once) when verifying a test.
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