Just throwing this out there for opinions.I've recently set up a new tank 65 display with a trigger systems sump.I've installed the skimmer in the drain section and was about to set up a refugium in the middle section when I stopped and figured I should ask for advise.Should I add sand to this section along with macro? Or should I just put macro in there, or should I skip the refugium all together and use that chamber for reactors and such as there is not much more room in the sump for these?What has and has not worked for you?I'm sure I can search the archives but figured I would start a new topic in the current format of the forum.Thanks in advance.