Thanks for the input, wayne!
I agree that the idea of using conventional substrate in this kind of biotope is potentially problematic! I think that the "rubble bottom" is essentially a barebottom system with rubble rock serving (at least from an aesthetic standpoint) as a "substrate". This is why I belive that we are both experiencing some success, with careful and due attention to husbandry procedures.
I've been using the little flat pieces of broken slab rock to construct a "matrix" of sorts, which still leaves some open areas. Sounds similar to yours.
I'd love to see some pics, if you have any!
Thanks!
Scott
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Current Tank Info: 14,000+ gallons of saltwater!
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