Let's say I was buying a larger tank or changing a tank in general. So I start with my established tank and get a new/different tank set up, clean in out and scoop my sand and the transfer most of the water and get the filter on the new tank (filter is from established tank) before transfering the fish. In my mind it would still be and established aqaurium water wise. My question is does this stress the fish out? Should there be any additives that would help the fish? Stress Coat etc...? Already peat in the filtration set-up. Thanks.