does anyone scrub new liverock with a brush

[Black Phantom]

I've always done it that way. I fill a large salt bucket with old tank water and then take the new rock and scrub away.
Just make sure it's a brand new brush that has never seen soap.
You have to use some discretion and not scrub away everything but it's the only thing that gets into all the nook and crannies.
Crannie?- sounds like an old highland term