网页2021-01-01 · Pangasius farmers used farm-made feed in 73 % of old and 60 % of new ponds, and the remaining 27 % and 40 % used local brand sinking feed. All tilapia farmers used commercial brand feeds, of which floating feed was used slightly more frequently in both old and new ponds (53 % and 60 %, respectively). 3.2. Presence of ANCs in fish