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Old 03-04-2021, 03:59 PM   #1
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Moving to larger tank

We need to move our Oscar from a 55 gallon to a 125 gallon tank. The GH in the current tank is too high (12-13), the Ph is ok (7.2) and the Kh is low (3). The Gh of our tap water is much lower (about 6) so if we use that to fill the new tank, even if we use most of the old water, will the change in Gh harm the fish? Any advice welcome!
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Old 03-04-2021, 04:11 PM   #2
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He'll be fine. Just get temp close.
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Old 03-04-2021, 07:02 PM   #3
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I agree with Brookster. And I'll add that he'll be a much happier monster fish in that bigger tank! Haha!
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Old 03-04-2021, 09:06 PM   #4
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Originally Posted by charliebankston View Post
I agree with Brookster. And I'll add that he'll be a much happier monster fish in that bigger tank! Haha!
Be like Will and John in stepbrothers..
SO MUCH ROOM FOR ACTIVITIES!!!
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Old 03-05-2021, 05:27 AM   #5
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Originally Posted by Brookster123 View Post
Be like Will and John in stepbrothers..
SO MUCH ROOM FOR ACTIVITIES!!!
Haha! And your not gonna not get Randy Jacksons autograph!
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Old 03-05-2021, 05:42 AM   #6
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Thanks so much! Do you think we should set up and cycle the new tank with its new filter, leaving him in the old one till it is ready, or move the old filter/some water/old gravel over to the new tank, filling the rest with new water to try to retain his existing bacteria? This is our first time trying this kind of move!
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Old 03-05-2021, 05:51 AM   #7
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Water has basically zero bacteria in it, so just use new water. That's what I do. Substrate has a little, if your not using it in the 55 then some in a bag or panty hose stocking will help. 95% of your beneficial bacteria is in the filter. Move it over for a few weeks, or the media into the new filter, and let it establish a new colony
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Old 03-05-2021, 05:53 AM   #8
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Just move him to the new one and monitor the water parameters. He'll be fine. It'll cycle fine with his nasty self and the old filter media, lol
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