ML
I went with the larger tilapia because I had a large number of LMB and very low forage base. Hence, I needed something that I knew would survive. This has really helped and all bream have bounced back with revenge since the introduction of tilapia. It took the pressure off without having to restock them.
I have had little success catching the tilapia but the ones I have caught have been 15-18" and over 5lbs. That will put your fly rod to the test.