There are a whole boat load of videos on you tube about filming on the water - and with good reason. The downward sensors get confused with water reflection, drones don't float, etc. I would suggest investing some time in watching those videos...
I pulled out my M2Z and smart controller yesterday to get ready for today's flight. The controller gave a message - needed a firmware update to V01.01.0076. After one try I got an error message - needed more memory, can't do the install. After...
If propeller guards are available for your drone, I would try those. I have prop guards, spay painted them red, and now the drone has a bigger footprint in the sky and is more visible.