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Fish introduction question

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Hi,

I have a question about introducing new fish to my main tank. I currently have some fish in a quarantine tank waiting to be added to the main tank. I currently dose the main tank with flourish comprehensive and a macro/micro mix and dose with flourish excel. I am not dosing the Quarantine tank with anything. I was wondering if the difference in water quality will be a shock to the fish when i add them to the main tank, should i dose the quarantine tank just to get them used to the water quality? I do plan on doing a 50% water change on the main tank to remove the excess nutrients before i add the new fish, but i still imagine the water will be somewhat different. just wondering what peoples thoughts are on this. thanks.
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