I finally setup a sump and am working on putting a refuge in it. I want to try Chaeto, a red mangrove and maybe a couple of other macros. My 2 questions are
1: its going to be a high of 33 next week, will the macro survive the winter shipping? or will I need to wait till spring
2: Do I need refuge mud or will plain sand work? I don't really understand what's so special about the mud?
1: its going to be a high of 33 next week, will the macro survive the winter shipping? or will I need to wait till spring

2: Do I need refuge mud or will plain sand work? I don't really understand what's so special about the mud?