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  #1  
Old 01-20-2014, 01:51 AM
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Default Cycle question

I want to cycle my new tank before I swap out.
Can I cycle with live rock with no light on the tank .
I could feed a little plankton for the pods no ?
Since there won't be no algae .

Was just going to take some live rock from my sump
And add a few water changes from my existing tank
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Old 01-20-2014, 01:56 AM
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You don't need light for the tank to cycle, and you don't need to feed it. In fact, you shouldn't feed it while it is cycling.
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Old 01-20-2014, 02:00 AM
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This is my own knowledge so you may want to wait for someone with more knowledge to pipe up. But if you transfer from tank to tank with minimal air time you should get no cycle. Unless your using ur own rock plus more live. If you transfer all livestock and rock at the same time the tank will be cycled. You are cycling the rocks not the tank.
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Old 01-20-2014, 02:04 AM
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After reading Chase's response...I was assuming you were cycling NEW rock. If you're ONLY using old rock from your old system then like Chase says, it shouldn't cause any ammonia spikes and shouldn't require any cycling.
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Old 01-20-2014, 03:00 AM
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+1 to the others. If all the rock from your old tank is going in to the new tank, and there's no new uncured live rock going in to the new tank, your cycle will be so small it will probably be undetectable.

You only need to worry about it if you're using all new rock in the new tank.
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Old 01-20-2014, 04:05 AM
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Quote:
Originally Posted by asylumdown View Post
+1 to the others. If all the rock from your old tank is going in to the new tank, and there's no new uncured live rock going in to the new tank, your cycle will be so small it will probably be undetectable.

You only need to worry about it if you're using all new rock in the new tank.
so say the tank you were doing a swap from was 60g and the new tank was a 100g . Could you just swap everything over ,if you were not adding anything new. Except for the water you have to add to fill the extra 40g ? It would be just like doing a 40g water change?
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Old 01-20-2014, 04:09 AM
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40 gallon to 150 gallon.
52lbs of cured live rock

Would the parameter stay stable for my corals ?
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Old 01-20-2014, 04:12 AM
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Quote:
Originally Posted by stinky View Post
so say the tank you were doing a swap from was 60g and the new tank was a 100g . Could you just swap everything over ,if you were not adding anything new. Except for the water you have to add to fill the extra 40g ? It would be just like doing a 40g water change?
that's what I would do. Personally I wouldn't even take the water. It would be like a big 100% water change, which every once in a while isn't such a bad idea to do, but that idea freaks some people out.

The only thing I would never take with me from one tank to another was the sand. Sand beds fill up with so much gunk and detritus over time that I think transferring a sand bed from one tank to another will cause more problems than it's worth. In that case you'll lose whatever nitrification capacity your sand was adding, but then I'd just test for ammonia every day for a week or so and dose prime if anything popped up.
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Old 01-20-2014, 04:17 AM
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Should not be a problem, just make sure the rock stays wet as to not cause any die off. I went from a 65 to a 155 the same way and had no issues at all. Take all the rock out you can without disturbing the sand ( if you have sand ) remove all the water you can again without disturbing the sand. Then pull out the rest of the rock, give it a quick dip in some fresh salt water and into the tank. If you are planning to use the sand from the small tank, give it a good cleaning first to remove any built up toxins.
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Old 01-20-2014, 04:26 AM
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Quote:
Originally Posted by darkreef View Post
40 gallon to 150 gallon.
52lbs of cured live rock

Would the parameter stay stable for my corals ?
There's a risk any time you transfer a tank, no matter how you do it. They'll stay stable if you are proactive about testing for them and responding before anything gets too out of whack. Your live rock isn't taking care of 100% of the nitrogen cycle in your tank since biofilms develop on pretty much every available surface, but it's definitely responsible for most of it due to the huge surface area. It's been my experience that live rock's capacity for dealing with nitrogenous wastes is pretty elastic once it's established. If you give the new system a good couple of weeks before adding new fish, I don't think you'll see anything bad happen, but definitely test for ammonia regularly for the first 10 days or so and have a bottle of Prime and the capacity to do a larger water change on hand just in case.

I would also try and disturb your live rock as little as possible. For example, try and place them in the new tank in similar orientations relative to the light source so that you don't have a mass die-back of photosynthesizing and photophobic life in the first few weeks. The undersides of all my rocks are covered in sponges that would be toast if I suddenly flipped the rock upside down, and nitrifying bacteria are photophobic, so they're probably more concentrated in areas that are currently shaded/in the dark in your current tank. If you try and maintain that for the first little bit it can only decrease the risk.
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