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Water changes while cycling?
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tr889
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Joined: 01 May 2005
Location: Michigan

PostPosted: 2005.05.05(Thu)16:40    Post subject: Water changes while cycling? Reply with quote

Quick question, Do you do the weekly 25% water changes while the tank is cycling?
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Tommy
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Joined: 06 Feb 2003
Location: San Jose, CA

PostPosted: 2005.05.05(Thu)17:33    Post subject: Reply with quote

We need more information first because it entirely depends on the method you are using to cycle the tank...

If cycling with fish it is advisable to change as much water as necessary for the health of the fish, regardless of whether or not it delays or prolongs the cycle of the tank.

If fishless cycling then no, don't change water...continue to add your ammonia right up till the day you plan to put in fish then do a major water change the day they go in.
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Tim McDonnell
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Joined: 25 Nov 2003
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PostPosted: 2005.05.06(Fri)13:02    Post subject: Reply with quote

Absolutely... that is if you are using fish to cycle the tank because oxygen will run low.
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benedictj
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Joined: 05 Dec 2004
Location: new york, ny

PostPosted: 2005.05.06(Fri)14:02    Post subject: Reply with quote

Tim McDonnell wrote:
Absolutely... that is if you are using fish to cycle the tank because oxygen will run low.


Actually, you'll suffer more oxygen depletion when a cycle is established then when it isn't. Nitrifiers consume a surprising amount of oxygen (approximately 5 mg of oxygen for every mg of toxin they consume).

The bigger concern with a fishy cycle is the ammonia and nitrite and the threat they pose to the fish.
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