Discus - Tank Size

Well, I keep discus and also belong to another discus forum. I am not an expert, but I do read allot. Here's from what I have gathered...

- Discus do well best in groups
- Unless it's a breeding pair, you should not keep 2 discus in 1 tank. There's more aggression and one may out compete the other for food.
- Minimum tank size for a group of adult discus, is typically kept in a 55 (US) gallon tank (48"x13"x20"), but a 75 is preferred. A breeding pair can be kept in smaller tanks, since there's not need to establish dominance, since they are a mated pair. The average tank size for a breeding pair is a 29 (US) gallon tank, but a 20 gallon has been used at times. I currently use a 20 gallon for my pair, but I plan to move them to a 29 gallon, becuase it seems so small for them.
- Juvenile discus can be raised in smaller tanks, but as they get bigger, they need to be moved to a larger tank. DO NOT keep baby or juvenile discus in a large tank to compensate for their growout. The babies/juveniles will have a hard time finding food in such a large tank.
- Juveniles need to eat several times a day, with a variety of foods. Any left over food must be removed in order to keep the water clean.

So unless you have a proven adult pair, then your 30 gallon is not suitable for discus. If you were planning to buy juvenile discus and have them growout in the 30 gallon, then it should be fine, but will need to be moved to a larger tank when they get bigger.

One thing to keep in mind is to buy discus from breeders. They are ALLOT cheaper than LFS/LPS. Breeders also will sell you quality fish, since they want the reputation of having healthy, nice looking discus.
 
Do you mean you succesfully kept 4 adult discus (i.e. 2 pairs) in one 18-20 gallon tank...? Or that a different pair in the tank whilst breeding as a short-term measure?


Yes, I do not have the space to have a larger tank which would be great obviously (I agree more space for discus is always better). I do feel it is possible to look after them successfully in smaller tanks.
 

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