We have liverock at my store in Milwaukee it’s called best fish. It’s live rock from the ocean that’s been in water for upwards of 10-15 years and is real rock and coral skeletons not the fake rock (which is much less porous than real rock) if you get it out of the stingray vat, all of those pieces are free of aptasia. It does have bristleworms though and just various types of clams and filter feeders but those those are pretty harmless. I used 7 pounds of this stuff to set up a bare bottom 10 gallon and I added 2 fish the same day with no issues and I added more fish soon after because it was basically an instant cycle for my that tank.
but If you want “pest free” liverock, aquatics unlimited in Milwaukee has some fake rock that is fed ammonia to keep the bacteria alive. But if it’s pest free, I don’t know what bacteria the rocks really have compared to the ocean stuff because the best thing the could do is just dose microbacter7 to the rocks with the ammonia. I tried using this liverock on my first tank and it was pretty much like starting with dry rock (I even lost fish during the cycle). I’m just about a year into my tank and it’s just getting out of the all the uglies now.
that’s about all I know for liverock around here.
