Best Rock to use as shelves and caves?

  • We are currently upgrading MFK. thanks! -neo

lighthouse39183

Gambusia
MFK Member
Nov 9, 2008
313
1
18
Mississippi
I want to form a rock wall with shelves and caves for my cichlids but I need to know what kind will not alter my ph and won't be so heavy in my tank. I was considering using a sand substrate also but I don't know which sand would be good to use either. Any suggestions?
 
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