How to clean GHA off rocks?

[myrepete13]

Torn down my old tank. GHA covered the rocks. How can I clean them before using them in a new tank? Soak in a bucket with hydrogen peroxide for a few days?

 

[Saltyreef]

Torn down my old tank. GHA covered the rocks. How can I clean them before using them in a new tank? Soak in a bucket with hydrogen peroxide for a few days?

I would consider bleach cure if they dried out.
If not, yeah peroxide and scrub them good.

 

[dmsc2fs]

Hydrogen peroxide mixed with tank water 50/50 and soak for 5 minutes will do it.

 

[EeyoreIsMySpiritAnimal]

 

[Tray21]

View attachment 3056041

Using a toothbrush and scrubbing in a bin with hydrogen peroxide and tank water worked well for me. I also gave my rocks a rinse bath in a separate container with "clean" saltwater.

 

[Jason_MrFrags]

Will only take 5 min in peroxide to kill it off.