How many Discus?

[diggler81]

How many Discus can I safely have in a 125 gallon tank? And can I keep a Arrowana w/them?

 

[reticstingray]

You can have about maximum ten discus in a 125 gallon tank with them being comfortable living together. Arowana is a no because they can't live in such a small tank as a 125. Even if you get a larger tank your discus will have no chance suriving against a arowana. Not many fish can live with an arowana unless it is a huge tank.

 

[Discus Origins]

What kind of filtration system will you be setting up and what size discus are you asking about? Both would be significant factors in answering your question.

 

[Bderick67]

Yah 125g is eventually going to be too small for arowana. However silver or black arowana and discus are easily kept together in the proper sized tank.

 

[moneygetter1]

I would estimate 10 to 12 adults is sufficient for a 125g tank. Would advise against the arowana if you're trying to max out Discus. The adult arowana will need more room in a very short time. If you double the tank size, I believe they could co-exist. Both the silver & black hail from the Rio Negro in the Amazon so water parameters not a problem.