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Old 03-03-2015, 06:38 PM   #11
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From what I know cured LR are already full of beneficial bacteria. So what is the purpose of adding ammonia? I would just let the bb that are already present in the rocks to consume whatever ammonia is given off due to die off.
The difference between plain live rock and "cured" live rock is that the cured live rock is immersed in water and is properly cycled without the die off that regular live rock has.

When you take this cured live rock out of water, wrap it in wet paper, and then ship it for days then you're killing a lot of the stuff that's on it. Sponges, bacteria, invertebrates, and so on. It stops fitting the description of cured live rock and instead just becomes live rock and needs to be properly cycled accordingly, especially since our beneficial bacteria is extremely sensitive to drying out.

Labeling live rock as cured, selling it at a premium, and then shipping it is a great way to con people out of money.
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Old 03-03-2015, 06:46 PM   #12
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The difference between plain live rock and "cured" live rock is that the cured live rock is immersed in water and is properly cycled without the die off that regular live rock has.

When you take this cured live rock out of water, wrap it in wet paper, and then ship it for days then you're killing a lot of the stuff that's on it. Sponges, bacteria, invertebrates, and so on. It stops fitting the description of cured live rock and instead just becomes live rock and needs to be properly cycled accordingly, especially since our beneficial bacteria is extremely sensitive to drying out.

Labeling live rock as cured, selling it at a premium, and then shipping it is a great way to con people out of money.

I agree. Once it's shipped there will be die off in the rock. This can promote algae blooms as well as extend the cycling time. Other than getting some free hitch hikers that could be good or bad, I prefer starting with sterile rock and let it seed itself. It's a heck of a lot cheaper as well.


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Old 03-03-2015, 06:55 PM   #13
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Bacteria will survive without heat or light as long as the rocks are moist for several days. Truly cultured LR doesn't have plants just bb.
And my last batch of rock I ordered came in a battered box with a 'sorry' note on it. You can't trust shipping. This is all about prevention.
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Old 03-03-2015, 07:00 PM   #14
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Cycling "cured LR"

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Bacteria will survive without heat or light as long as the rocks are moist for several days. Truly cultured LR doesn't have plants just bb.

I hate to disagree. I have never received "cultured live rock" that didn't have several varieties of algae clinging to it in various stages of decay.

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Old 03-03-2015, 07:18 PM   #15
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Your arguments seem to define cured LR as just the same as dry rocks where cycling is a must. If that's the case then what's the point of buying expensive cured LR? I'm sure everyone knows why the cured LR are kept moist when shipping.
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Old 03-03-2015, 08:59 PM   #16
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I think the point is that once shipped the rock isn't really "cured" anymore. The curing process is a adaption process for the rocks bioload to help prevent shock and die off. Shipping the rock and introducing it to totally new water conditions would seem to reset the process of adaptation. So why buy cured rock unless it's been sitting around in your water for a while, adapting. That's why I would buy live rock and cure it at home. JMO


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Old 03-04-2015, 01:38 AM   #17
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When I set up my 29 gal nano, I had used all cured LR with sand substrate. I did not have to cycle my tank and I did not have any problem after introducing fish on it. The only difference is that I bought the cured rocks locally. Having that said, the good advice would be not to buy cured LR on line and have it ship for several days. That's why my first comment on the thread is "it does not makes sense buying cured LR and then clean them".
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Old 03-04-2015, 01:55 AM   #18
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Old 03-04-2015, 09:05 AM   #19
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So how long should I cure the rock?

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Old 03-04-2015, 09:45 AM   #20
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I agree. I would not trust shipped rock to be cycled unless it was shipped submerged in heated water- an impossibility. At least test it in a separate container with an ammonia source.
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