Tracy, we are approved for 18 GC on this 3 1/2 ac but thought that was overkill, 10 is a good start. I've controlled most of the moss/southern niad with reward/cutrine plus but the fish are cheaper and less work. We'll see.
As to the tilapia, I was told they will spawn at least 10 times this year. That's what I wanted to hear. Bonus, they eat the Filamentous algae, slime.
I never have heard of any special cleaning for tilapia.
