phil519 said:The Hang on the Back Refugiums.
First off - maintenance is a huge pita.
Second of all - the amount of "refuge" is limited and by it's design - not optimal (small surface area). Save your money and use it to set up a under the tank sump with a fug.
Finally - in my opinion the fug should be fed water either from the return or AFTER the skimmer. Water coming direct from the display is nasty and makes a mess of things. See point #1 and you're in a never ending cycle.
I have to agree with you here. The one I had did all those things. In addition, the hanger things broke and sent the thing crashing down into my sump, breaking a chunk out of that. Luckily I was home, and was able to fix things quickly and only had a minor flood.