They were in a 5 gallon tank with an algae eater, I left the one that was acting sick in the 5 gallon tank and moved the one that was acting healthy into a 10 gallon tank along with the algae eater. The sick acting one sometimes lays on the bottom of the tank barely moving but a while later will swim around like he is healthy. His scales and fins all look healthy with no signs of anything being wrong. The other fish, acts healthy and is always swimming, however he has lost his whiskers, and his fins look like he’s been in a fight. I feed them both freeze dried brine shrimp. Does anyone have a possible explanation or know of anything I could do for them.
He seems to be eating okay still, likes to find bloodworms, brine shrimp and flake food that my betta doesn’t grab and loves munching on algae wafers.