Bare bottom, no rocks, only media in sump

[TomPham]

Redsea xxxl 900, bare bottom. Thinking of slowly removing all of the rocks and placing 96 pieces of eshopps bio-lux in the sump. Please give me your opinion.

 

[Spare time]

I have not used that, but it's probably fine. Seachem matrix is what I have previously used but the pore network probably gets clogged easily. What kind of rock is down there? You could also do a big bag of crushed coral (likely what I will do next time)

 

[mindme]

 

[Gedxin]

Really liking the bio-lux in my sump. I've only got 4 pieces but they've been kicking butt (no real evidence admittedly.) Huge surface area for their small size.

 

[Spare time]

I think he is saying removing the sump rocks not the display rocks (since rocks take a lot of room and modern reef rock is basically non porous brick). Or at least that is how I interpreted it.