What substrate for a 7 footer display tank ???

[Ulysses048]

Recently purchased a 7 footer which we intend to use as a display tank for Africans.
We want to view the tank from both sides and have rock formations going down the middle of the tank.  
We need a substrate that is soft enough for the fish to dig in - but also able to support the rock formations.
Has anyone any suggestions ?????

[ashhhh]

i prefer the fine calcium carb substrate, almost like sand and the fish love to dig in it and sift through it, great buffer too :wink:

[climber05]

if you going to use alot of rocks i would reccomend using eggcrate along the bottom of the tank to distribute the weight better.
cheers
chris

[Spongebob]

Ben from A.O.A. is the cheapest on good quality c/c
Regards
S.B.