my tetra raspora harlequin has been swimming on her side for three days now. All other fish are ok. I've had my tank up for 9 months and my readings are within parameters. Any ideas as to what this could be?
No he looks normal does eat just swims on his side in circlesDo you have any pictures?
Does the fish try to swim and can't? Is the belly bloated? We need more details on their behavior.
Are they eating?