Join Date: Jan 2011
Location: Wake Forest, NC
I have never replaced any of the EhfiSubstrat I know I am suppose to replace 1/3 periodically because the pores get clogged with bacteria and then it doesn't catch as much. I heard some people boil part of the EhfiSubstrat to remove the trapped bacteria in stead of buying new. But I have never tried that. I've cleaned out the whole thing before but will need to do get some new EhfiSubstrat soon.