i got some holy rock for my new cichlid tank and it was free but i need to know how to clean it can i use bleach and if so what concentration. i asked about bleach because it is pretty dirty and i wanted to know if it would whiten it up some. thanks.
1/10 bleach to water it usually doesnt whiten it up its just to kill bacteria you may want to try taking it to a car wash and try pressure washing it and make sure to rinse well in both cases