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Old 08-20-2006, 08:05 PM   #1
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New Filter + Water Cylcing Q

I just got a new filter today, Penguin 150 Bio-wheel, Hang-on-back type.

I was j/w, is there anything wrong with doing a partial (15%) water change now (a few hours) after installing it?
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Old 08-20-2006, 08:07 PM   #2
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Nope. You can do one at any time. Is this going on an existing established tank?
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Old 08-20-2006, 08:09 PM   #3
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Yes it is. Previously my dad had installed an undergravel filter. Infact its still there, just haven't changed the filter in a long while.
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Old 08-20-2006, 08:12 PM   #4
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Run both on the tank for at least 2 weeks. Then you can safely remove the ugf. Keep the same filter in the ugf during this time period.
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Old 08-20-2006, 08:14 PM   #5
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Is there any adverse effects to just leaving the UGF?
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Old 08-20-2006, 11:19 PM   #6
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If the UGF is really dirty, it can have anaerobic pockets of ammonia which can kill your fish if they're disturbed. I'd recommend removing it if your fish dig up the substrate, or if you do w/ a gravel cleaner.
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Old 08-21-2006, 12:27 AM   #7
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It collects debris under the plates and can cause high Nitrates if not cleaned properly. It's an unneeded pain to deal with.
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