So, I've had this red oscar for a few months. Since around the beginning of December. This dude was a beast of a fish. He was a juvenile. He has lived through an ich infestation, lived in a tank while it was being cycled, and has outlived two other juvenile tiger Oscars. He's never shown any signs of weakness.
looked very well fed. I did not overfeed; I fed him pellets a few times throughout the day, small amounts each time. i wasn't worried about excess food on the bottom of the tank cause i knew the catfish will eat it at night. i still sprinkled several pellets every evening for the sun catfish (3") (every once in a while, I would cut up a small frozen shrimp and put in the tank for the fish to eat. all the shrimp bits would be gone in a couple of days). the oscar was happy, healthy, and growing. i did a 40 % water change (40 gal tank) on Saturday, April 13th. my water parameters were good.
then soon after the water change, i took in a dinosaur bichir (2-3") and a 2 African dwarf frogs for my brother. the oscar became interested in his new neighbors, it was actually rather funny because he seemed quite confused with the bichir (we kept him with the bichir for a few weeks when we first bought them, so we were wondering if he remembered the bichir or maybe was having de ja vu). there was no bullying. the fish and frogs all seemed happy to be neighbors.
but then on Thursday, April 18th, I woke up and my oscar was just lying dead on the tank floor. he just up and died randomly and I can't figure out why. food was good. tank mates were good (don't think it was overstocked cause fish are still small), water conditions were good.
Does anybody have any ideas why my oscar just randomly died, but my other animals are doing just great? the bichir, frogs, and catfish were all putting on some size. they were well fed (i was feeling proud too, cause I was gonna return my bro his animals and they were gonna look bigger and better than ever)
so, does anyone have any clue why my oscar decided to die on me?
