Size of tank in gallons or litres.
How many fish and which type.
Water stats in ammonia, niitrite, nitrate, and ph.
What worming med do you use and do you have to retreat.
You have to use a bacterial med after worming as internal parasites do alot of damage to the internal organs resulting in bacterial infections.
Swimming on there sides can be swim bladder to internal parasites.
What do you feed your fish.