So I decided to jump in with both feet I'm building a sump from scratch minamal live rock in display. My question to you fine people is i want to use marine pure bio media but i cant find any info on how much i need any one know?
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Exactly.and I'll be using a filter sock as wellI've used Matrix -similar type of product- in my QT and a very small amount has worked wonders for my 7 fish in QT. I would say you wouldn't need a whole lot. I also say it's not going to hurt to have more. Just watch out for detritus build up between them all as I imagine they will be kept in a chamber in your new sump.
Surely....or when i do a water change just remove clean in old water siphon replaceI figure as long as you stir up the area its in and syphon out any build up of detritus then you'll be fine.

