Holey is more expensive, so that's a negative. Though, the name is not misleading: holey rock has a lot of holes,which equals places to hide, which is useful for the aggressive Africans. I preferred the look of lace rock, but once i went with holey rock I didn't look back.
As for the ph buffering- yeah, fish can survive in any manner of conditions, but just because they can doesn't mean that they should. Color, breeding, and just longevity: all these things are better when the fish are more comfortable in a natural environment. That's my experience abyway. I am no expert.
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