HF, it won't hurt to use the leftovers, but food specifically made for Tilapia will be less expensive long term, and have the correct trace minerals, etc. for best growth.
Heck, get the Tilapia food and mix in what left over Optimal you have to use it all up this year. It wouldn't be any worse than a tilapia eating Optimal in a pond.
Last edited by esshup; 08/23/16 10:36 AM. Reason: clarification
