I'm afraid to mess things up. Any advice?
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Clumsy.Mess things up how?
Thanks, I'll chill for,another day and test.As a general rule you don't do a water change on a quarantine tank during the first week fish are in it. This gives the fish a chance to settle down and recover from the move (taken from the pet shop to your house). After a week you do water changes just like normal (partial water change and gravel clean the substrate once a week).
The only exception to this is if there is an ammonia or nitrite problem in the quarantine tank, then you do water changes to get the levels down to 0.