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Old 02-13-2007, 11:22 AM   #1
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when cycling a tank should I do water changes.

I have a 120 gallon reef taking. Cycling with live rock. How often or ever should I do water changes when cycling?
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Old 02-13-2007, 11:26 AM   #2
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Please do not cycle your tank with live animals.

Assuming you are not cycling with live animals, you don't need to do a PWC until your ammonia and nitrItes reach 0 and your nitrAtes spike.
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Old 02-13-2007, 11:35 AM   #3
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My local fish store advised me to add 8 damsel. after reading the forum on topic, it is realized that not only was it a bad mistake but I will never trust those boneheads again. I am having problems catching them. because there are fish in there should i do water changes.
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Old 02-13-2007, 11:50 AM   #4
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It is probably best to really take out the rock and catch and return them, otherwise they tend to become agressive and will limit your new fish selections. On another note, they will be hard to catch once you have your tank cycled and the aquascape how you like it. You will end up having to take out the rock to get to them, anyway.
Here is a great article on the Fishless Cycle .
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Old 02-13-2007, 02:59 PM   #5
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I guess you realize now that your LFS is only out to make money. Any decision he can make that will profit him he will do. We dont stand to make anything off of you so ask away and we will help you along. Normally I would say dont do a cycle but with fish in there I would do some PWC`s. If not alot of them will die. This will of course extend your cycle time. Your LFS does not care if they die but you and me should. I would also suggest you find another LFS. Any questions just ask.
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Old 02-13-2007, 03:22 PM   #6
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how often, 10% per week
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Old 02-13-2007, 04:33 PM   #7
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How many Lbs of LR do you have in there?
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Old 02-13-2007, 04:35 PM   #8
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Old 02-13-2007, 04:36 PM   #9
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I would recommend that before you do any water changes, get an ammonia test kit. Test for ammonia. If ammonia is above about .1 ppm, you should probably do a 20% water change. If it is way above .1 ppm, you should do as big a water change as is necessary to get it under .1 ppm. Of course you shouldn't do more than about 30% at once. So if you are at .2, you should change out about 60 % of the water, but over 3 20% water changes. This will allow you to bring the ammonia down without stressing the fish more than they are being stressed already.

The reason I think you should test is that your aquarium is large, and you have live rock. Sometimes you won't see ammonia get very high in situations such as yours.
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Old 02-13-2007, 04:37 PM   #10
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when cycling a tank should I do water changes.

I agree, can you post your test results? With that amount of CURED LR, you may not experience much of a cycle.
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