I have a Discus juvenile around 5 months .. it has clamped dorsal / anal fin and it swims like it has no co ordination .. it is eating and colour is ok it can swim to top of tank and around the tank but sometimes looks like it gets tired and rests vertically on the bottom of the tank before it sets off again . If it’s up at top of the tank and gets gets in airstone bubbles it ends up side ways in the bubbles .. .. water parameters all ok water changes completed every couple of days aquarium salt added had a treatment of internal bacteria ... is this a swim bladder issue ?