best way to get old dead rock white again???

[Ruth]

I'ts hard to know if there was any difference. I have always had good coralline growth in my tanks so it is hard to tell if this stuff helped it grow faster or not. It does seem to keep your calcium up and appears to be a balanced additive so IMO it doesn't hurt. There was definately no disadvantage that I could see. Of course you should always check all of your levels to make sure they are balanced and within an acceptable range - I try to shoot for NSW levels for the chemistry I have the ability to test for.

[demon666]

ok kool i picked some up lastnight and have to do a water change today of tommorrow so ill start adding it then i really dont want to start at green rocks in my tank pink and purple would be way nicer

[clipperfish]

Hello . I bought some live rock from someone .awhile ago and it was covered in green alge and hair alge . what i did was cook it for three months in a tub of saltwater with no light at all .the alge disappeared altogether .And I change 50% of the water weekly .it might not take that long but i was moveing so i left it for three months .hope this helps .