I have a established 40 gallon Hex tank that I just restocked with a few Curviceps. The tank is well planted and would just like to add about an inch of sand to it as it has a medium sized gravel base. Is this advisable to do and what kind of sand should I use? Would this be better if I want the Curviceps to breed? The tank has some driftwood caves and may add a bit of rockwork for them too. These are my first cichlid in about 45 years. I have bred Angels and Jack Dempsey's a long time ago.

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