There are many complications one must avoid. A good way to avoid such problems is to have a segregation tank for fish not suitable to be with the others. These tanks are often known by other names such as, quarantine, hospital, conditioning, treatment tanks etc. Taking the suggestions of an accomplished hobbyist into consideration may sometimes be helpful. Conditions vary from aquarium to aquarium.
Conditions vary from room to room.
They also vary from one residential area to another. It is very important to set up an aquarium for the express purpose of its' intended purpose. Treating diseased or injured fish in a regular aquarium with the other inhabitants could be harmful to the others. This is sometimes the reason fish die for no apparent reason. Aquariums receiving standard maintenance procedures do not need to be overdosed.