Adding rock to established tank

[NuckChorris]

So I want to add some more rock to my tank to have more space for acro placement, but I don’t want to cause any chemistry issues.

Should I cycle the rocks in a separate tub with saltwater for awhile before adding? I don’t want to spike Po4. And I’ll use dry rock because I don’t want to get hitchhikers like mantis shrimp.

Can anyone share their experiences doing this?

 

[Mr. Mojo Rising]

You can cycle them in advance, that will work, or you can put them in your sump for a month. Or if it is just a few rocks, you can add them straight to the display tank, I find that adding a couple of white rocks to a mature tank won't really cause it to grow algae. But if its a lot of rock you will add I would cycle them first.

 

[Piotrek]

I've added new rock a few times and saw no issues. It wasn't much though, less then 10% of what was in there in the first place. You can rinse it with water from water changes to get rid of the dust first.

 

[mfinn]

So I want to add some more rock to my tank to have more space for acro placement, but I don’t want to cause any chemistry issues.

Should I cycle the rocks in a separate tub with saltwater for awhile before adding? I don’t want to spike Po4. And I’ll use dry rock because I don’t want to get hitchhikers like mantis shrimp.

Can anyone share their experiences doing this?

Adding new dry clean rock will not cause any issues.
Get it from a trusted source so you know it's clean.