I think you should wait for your gar to be given away first. Then, you can run a full-on brackish set-up with the eels.
Tilapia, mussels, shrimp. Once on a brackish setup, they’ll be easier to convert to pellets.
You mentioned something about a fisherman? If they were caught on a fishing line, their last meal was pretty traumatic. As was the move from their home to your pond or tank. Give it a while, offer food every other day and remove what is left uneaten.
Use tongs to target feed so the eel smells the food. They have terrible eyesight and until a good feeding response is initiated, they’ll just eat what’s right in front of them.
Use table salt if you wish to eat them.
Use marine salt if you wish to raise the salinity.
Use aquarium salt if you wish to treat for ich and.
Use marine salt if you wish to raise the salinity.
Use aquarium salt if you wish to treat for ich and.
