Tank "Cycling" Question...

kyley

New member
Hi All,
Bear with me for some background... I'm working on an upgrade from a 65g to a 120g tank. I bought the 120 while it was in use, broke it down, and put the live rock in a 40 breeder and also got some new live rock that had been sitting damp for a month which I put in a 10g tank. All the rock has been sitting in those tanks for about 3-4 weeks and I've been feeding them too. I tested the water in those tanks today and found that Ammonia and Nitrite are both 0. Several days ago I added dry, well-rinsed sand to the 120 and some of the live rock. Ammonia and nitrite are 0 there too.

So my question... Think I can safely add my 3 tangs to the 120 now? I don't really think I will have a cycle - especially since the rock is clearly processing the ammonia. And I don't see a better / safer option.

Reason? I have 2 (know healthy) tangs (hippo and sailfin) in a quarantine tank (with 2 sponge filters) and found the ammonia is at 1 - after less than 2 days of being in the QT! Even after a water change. I have a yellow tang in my 65g. I'd like to introduce all 3 now (if I can catch the yellow) so that they're on equal footing and because I don't think I can keep ammonia under control in the 30g. Think this will be okay? FYI, the hippo and yellow are about 4" and the sailfin is about 5" or slightly more. Thanks,
--Kyle
 
You're probably fine. You could test the LR by dosing ammonia and seeing how long it takes to process 2ppm. Should be 24 hours or less if nitrifying bacteria levels are sufficient.
 
Test your nitrate. If its shows some numbers, it should be fine as mentioned you feed the rocks. Putting two tangs in 120gal i wont be too worry. [emoji111]

Sent from my SM-G930F using Tapatalk
 
Thanks all. Nitrate was up, so they were converting. Fish are added and looking happy to be out of the QT! :-)
--Kyle
 
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