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Old 12-26-2015, 09:20 PM   #1
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Is it necessary to cure rock in a cycling tank

I'm setting up my first salt water reef tank and if is in the process of cycling. I already have some live rock I bought in the store in there and planning to buy some dry rock tomorrow. What I wanted to know is if I need to cure the dry rock I buy if I'm putting it in a tank with no live stock in it yet and is still cycling. It won't have any live stock for at least another week. Any help would be great.


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Old 12-27-2015, 03:52 AM   #2
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If you are planning on adding stock within a week i would cure the new rock separately.
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Old 12-27-2015, 06:09 AM   #3
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How long has it been cycling for? I'd buy the rock and set it up how you want it. You'll be able to cycle the tank and rock in one shot..you'll just have to wait longer to add fish.


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Old 12-27-2015, 01:29 PM   #4
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No, you do not need to cure the dry rock before hand. The Live Rock will seed the dry rock itself, and give you more bacteria. It will also not hinder the cycle if you throw it in there now.
Because the rock isn't live and will have no die off, it will not affect the cycle, just watch the numbers of the tank, the actual live rock you have will cycle the tank. And if the live rock was cured, you will be able to add live stock in a week or so.
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Old 12-27-2015, 03:35 PM   #5
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No, you do not need to cure the dry rock before hand. The Live Rock will seed the dry rock itself, and give you more bacteria. It will also not hinder the cycle if you throw it in there now.
Because the rock isn't live and will have no die off, it will not affect the cycle, just watch the numbers of the tank, the actual live rock you have will cycle the tank. And if the live rock was cured, you will be able to add live stock in a week or so.
The problem is that dry rock is not necessarily ammonia free. At one point i set up a hyposalinity tank with a box of dry rock i bought from bulk reef supply. Thankfully before throwing the fish in i tested the ammonia and it was higher than my test kit could read.
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Old 12-28-2015, 12:58 AM   #6
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I'd recheck the test kit. Theres nothing in the rock to create any ammonia issues. Phosphates yes, Ammonia, no.
Ive thrown 50lbs in my tank before without any issues.
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Old 12-28-2015, 01:06 AM   #7
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I'd recheck the test kit. Theres nothing in the rock to create any ammonia issues. Phosphates yes, Ammonia, no.
Ive thrown 50lbs in my tank before without any issues.
There's nothing wrong with the test kit. While it's not super common to have dry rock create an ammonia spike it definitely does happen. The only way to make sure that dry rock will not cause an ammonia spike before it goes in the water is to use man made dry rock.
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Old 12-28-2015, 01:03 PM   #8
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There's nothing wrong with the test kit. While it's not super common to have dry rock create an ammonia spike it definitely does happen. The only way to make sure that dry rock will not cause an ammonia spike before it goes in the water is to use man made dry rock.
And the Rock from Bulk Reef Supply is what?
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Old 12-28-2015, 01:35 PM   #9
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And the Rock from Bulk Reef Supply is what?
their "reef saver" variety is all natural rock/coral skeletons from ancient dead reefs.
Bulk Dry Live Rock & Live Sand - Bulk Reef Supply
which they do strongly recommend curing before use. even though it has been soaked and rinsed, there is still a high percentile chance that there are still bits of organic material deep in the crevices of the rock, hence the need to cure it and the ammonia spike.

the other types, Fiji, Pukani and Tonga, are all harvested from the ocean and while they have been cleaned and dried, they are still full of stuff and need to be cured.
"NOTE: This rock does come out of the ocean and may have some dead material on it such as sponges or other critters. We strongly suggest soaking or curing the rock before use in an active aquarium."

the only man-made rock they offer is this;
Project Reef Rock 2.1 Dry Rock - Walt Smith - Rock & Sand - Bulk Reef Supply


Haven't you ever read the descriptions?
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Old 12-28-2015, 02:47 PM   #10
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I posted the same question awhile back when I bought the reef saver rock. I ended up adding the rock to my tank without curing it and had very little change (or at least nothing I could relate to the new rock) I think if your tank is in the cycling process with live rock that you should just put the reef saver in. You may save yourself some time in the curing process but you may have to wait a little longer to add fish. Everything I've read of user accounts with the reef saver rock goes back and forth between yes cure it or it doesn't matter. It's your chance to take


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