quack Posted October 26, 2006 Report Share Posted October 26, 2006 i need to top up the sump with some more bio media and was wondering what the story is with scoria. ive heard of people saying that you need to treat it with hcl acid and bleach and some people say that they dont and never had. im looking for opinions from people that have had experience using it and people that may of had bad experiences with it as i really dont want to use it if i have to treat it. Quote Link to comment Share on other sites More sharing options...
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