I once took 120 lbs of real rock from all over the world under my porch in a black plastic bag it was covered in GHA aptaisa and every nasty thing ever, long story short I went back to get the rocks 5 years later, did a muriatic acid wash and rinsed em used em , and still have them today. No man made rock can touch the porousness of real LR , so in effect its just to mount on , its not the filter that people think it would be,like real LR, BRS did a study on that , I would use the real rock and clean it if it were me. some people use non scented bleach , some use muriatic acid.
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