The best method of tropical fish disease prevention is to prevent poor fish health is carefully choosing the original stock combined with the use of a quarantined / hospital tank; good aquarium hygiene at all time and regularly checking all aspects of water chemistry. When you originally stock or add a fish to your community its well worth understanding what the fish may of gone through to get there. Many fish are bred in the far east. The journey to your local stockist normally begins by being starved of food for a couple of days then packed with at least fifty other fish into a plastic bag and placed into a polystyrene box and flown half way around the world. During transportation the water will contain waste products and the oxygen levels and temperature will become dangerously low. After the journey the fish will hopefully be quarantined in a wholesalers tank. If not it could have just been given a general treatment like chloramine T and passed onto a local stockist within a few days. This fish could quite possible be in your home aquarium a few hours later. This type of journey stresses the fish and does not help the aquarium owner at al regarding tropical fish disease prevention.

Tropical Fish Buying Guide

To assist with tropical fish disease prevention when choosing a new fish only buy from a reputable shop / dealer. When selecting a new fish reject if any of the conditions are present  :-

1. Cannot Swim effortless or maintain a steady position in the tank ( floats to the surface
   or drops to the bottom of the tank ).
2. A very thin cross section or abnormally thin body compared to other fish of the same
   species.
3. Folded down, split or frayed fins ( Possibly infected with fin tai rot).
4. Spots, fungus, wounds or any body damage.
5. Abnormally small or large to add to your existing
   community as this fish may either
   be eaten or start to eat your existing stock.
6. Excessively expensive. Only buy expensive fish when you are a more experienced fish keeper.

All addition to help tropical fish disease prevention even healthy looking fish should be quarantined in a small quarantined / hospital tank for at least 2 to 3 weeks. This should be enough time for any diseases to manifest. If any disease is noticed the tank can be converted into a hospital tank. A basic quarantined / hospital tank consist of a small tank of known size that has good aeration. The lighting should be dimmer than normal. The tank should provide plenty of hiding places ( use small plastic plant pots ) and contain fake plants made from plastic. The plastic pots and plants can be disinfected between uses. When
moving fish between tanks ensure that the net is cleaned and disinfected. It is usual to have a separate net for each tank including your hospital tank to limit the chance of cross contamination. Adding fish is not the only way to introduce disease into your aquarium, plants should be cleaned before adding to your aquarium. They should be fully rinsed under a running tap and bathed in a weak solution of potassium permanganate to destroy minute aquatic life in their leaves.

By following these simple steps  of tropical fish disease prevention you will hopefully have a disease free aquarium.