Buying liverock- advice please

[Aquariumaddictuk]

Evening all

Im finally setting up my redsea reefer 170 this week & as mentioned in a previous thread im using predominantly caribsea liferock & live sand.
I want to add some cured live rock to the setup for its bacteria benefits & to hopefully cut down cycling time.
Ive seen some for sale locally thats from a very well established system that is being closed down & looks pretty neglected.
My concern is elevated phosphate levels in the rock.
Im hoping a good soak in some fresh RODI will help leach this out but if anyome has any further advice id be grateful!

 

[blaxsun]

In addition to phosphates, there might be other elements that could potentially leach out as well (especially if it does look neglected). Soaking the rock in anything but saltwater (78°F) will probably kill most of the established bio media you'd be trying to preserve.