I used both Purina MVP and Optimal. MVP was cheaper by the pound & available seven minutes from my pond, so I probably used more of it.

Both are very good, in my humble opinion. My fish enjoyed them about equally. Optimal claims that it has less waste & thus is healthier for the fish, which may be true. If your pond is very fertile, easily slipping into blue green algae issues, Optimal might be preferable. At my infertile place, this wasn't much of an issue.

7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160