Marine Pure how much?

[Ramon Estevez]

So I have a 90 gallon tank with 4 fish, about 60-70lbs of live rock. Trigger 26 sump with Carbon mini reactor an 8x8x4 and an 8x8x1 marine pure block in the refugium section. With those blocks should that negate the need for a lot of live rock? First pic is before I changed the scape.

 

[tdileo]

With 4 small fish and that much marinepure, you could have just enough rock (Maybe 15 pounds) for the fish to hide and be fine.

 

[Ramon Estevez]

I figured the Marine Pure would be more than enough.