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Old 12-15-2004, 11:03 PM   #1
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Cyling need if seawater is used?

Do I still have to cycle the tank even if I'm going to use seawater?
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Old 12-16-2004, 06:16 AM   #2
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Yes! Some live rock will greatly help in speeding up the cycle also...but you will still have a cycle. Add a raw shimp or the like to get it started and don't add livestock until ammonia and nitrite are 0 (and a water change is done)
good luck
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Old 12-17-2004, 03:29 AM   #3
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Yes...the biological filtration you need to establish occurs on the rock and substrate surfaces...not in the water itself.

I have to think that this process might occur slightly quicker starting with ocean water, but that is just speculation on my part.
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Old 12-17-2004, 09:23 AM   #4
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Moved to getting started forum.
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Old 12-17-2004, 01:07 PM   #5
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Just be careful using real sea water. You may run into diseases and/or contaminates. The best mix is salt (oceanic/IO), and RO or RO/DI water to get the process started. I have also heard you will have to do more frequent water changes with real sea water as well. Food for thought

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Old 12-17-2004, 01:13 PM   #6
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Just curious: why is the water change needed just before adding fish but after the aquarium is cycled? Jeff
I wish there were a sea near here where I could get water from!
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Old 12-17-2004, 01:18 PM   #7
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A water change is necessary before adding fish to replace some of the nutrients and trace elements.

Not recommended during cycling since it removes some of the benificial bacteria to help the cycle along.
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Old 12-17-2004, 01:24 PM   #8
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Beneficial bacteria are primarily on your surfaces (sand, rock, glass, etc.)

"Waste/Excess Nutrients" are in the water column itself.

Water changes get rid of the excess nutrients, and also replace trace elements as mentioned above.

I don't believe that doing water changes in the midst of your cycle will cause any significant change in the time it takes to finish. Just my 2c.
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Old 12-17-2004, 05:26 PM   #9
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Actually doing large water changes may make the cycle last longer.....Just my o2.
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