if they were wild caught they might notice the difference. but tank raised fish will appreciate the caves all the same lol but if you can afford it, by all means change the rocks if it makes you feel better about your tankAppreciate thatNot meaning to steal the OP's thread...... but I am planning to upgrade to 75gal and will decide then if I keep the rock and add to it or replace it with more geographically correct rock.![]()
Thanks,
Steve