Boondoggle, did you perform an exhaustive search of the forum?
In my (fuzzy) memory, there have been lots of threads on adding tilapia. There have been lots of threads on spawning habitat for BG, LMB, SMB, YP, CC, etc. However, I don't recall any threads on spawning habitat for tilapia!
It is kind of related to my question upthread about how much FA is consumed by the tilapia SPAWNED in the pond when the total population of tilapia are killed every winter. If you don't find any good info in the archives, perhaps you need to start a new thread specifically asking about creating good spawning conditions/outcomes for tilapia. I bet you would eventually get some good responses from the people that have introduced tilapia into their ponds over several years.