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Imaexpat2 · 05/15/2018, 08:06 PM

Depends on what you want to accomplish and how much you "vacuum the gravel bed.

I recently went to a BB in my 20 gallon and despite no fish and almost no feeding of my corals I was BLOWN AWAY at how much crap accumulated on the floor of my tank! So I dont use substrate anymore except in certain situations in my frag tanks and then I use Crushed Coral. From an asthetic point of view I prefer "oolitic sand", especially if I have sand sifting critters in my tank.

05/15/2018, 08:06 PM	#2
Imaexpat2 Registered Member Join Date: Sep 2003 Location: Chagos Arch. Posts: 474	Depends on what you want to accomplish and how much you "vacuum the gravel bed. I recently went to a BB in my 20 gallon and despite no fish and almost no feeding of my corals I was BLOWN AWAY at how much crap accumulated on the floor of my tank! So I dont use substrate anymore except in certain situations in my frag tanks and then I use Crushed Coral. From an asthetic point of view I prefer "oolitic sand", especially if I have sand sifting critters in my tank.