Bleaching used rock

[N2theUnknown]

Muriatic acid would be a better choice IMO, it dissolves/cleans the surface of the rock, removes vermetid snail tubes and other deposits better than bleach. At least that is what I always used. 50/50 dilution and only takes 5 mins to clean the rock.

How do you dispose of the acidic water? Or best practice of disposal I should say

 

[Jamie814]

How do you dispose of the acidic water? Or best practice of disposal I should say

Down the drain or gravel lot outside. Dilution further with water if concerned but the more rock you clean with it the less acidic it gets anyway. I suppose you could also mix some kalkwasser into it to neutralize it also.