What is the biggest fish I could keep in a 200L tank?

  • We are currently upgrading MFK. thanks! -neo
Personally, I think the best options for a 55-gallon tank would be Convicts, EBAs, Geophagus Tapajos, or Angelfish. Some of these can mix, and others can't. As fishhead0103666 fishhead0103666 said above, it depends on whether you want quiet, peaceful fish or aggressive "glass bangers."

Also, Striped Raphael catfish are one of the best options for a "mini-monster" catfish if you are interested in catfish. They are nearly identical to Irwini Soldier cats yet are a fraction of the size.
Catfish seem cool. Are there any predatory catfish? The striped raphael almost reminds me of a mirror carp
 
It seems to me that what you want is a catfish. They're impressive in appearance, often tolerate beginner's mistakes, and when kept in a single-species setup are a lot more personable than you'd expect from the seen-once-a-month plecos in community tanks. Because they're more sedentary than many other fish, you can also keep a larger animal than you would otherwise. A ~15 cm cichlid would be barely adequate for a 200L tank, but for catfish you can get away with e.g. a 25 cm Chrysichthys ornatus with enough filtration.

Maybe look into e.g. a single Batrochoglanis raninus, mid-size Synodontis, mid-size plecos, maybe a small group of pictus cats (not as big but far more active) if your 200L has a good footprint etc.
I do like catfish
 
Catfish seem cool. Are there any predatory catfish? The striped raphael almost reminds me of a mirror carp
Would you be interested in a solitary predatory catfish? If you could bump it up to a 48”x18” foot print tank you could get a gulper catfish.
 
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Would you be interested in a solitary predatory catfish? If you could bump it up to a 48”x18” foot print tank you could get a gulper catfish.
That is around the same size at the 200L tank i was looking at (122x45cm). I don't know if gulper catfish are allowed to be imported to australia
 
Would you be interested in a solitary predatory catfish? If you could bump it up to a 48”x18” foot print tank you could get a gulper catfish.
I can mainly find native catfish, Plecos, bristlnose, and whiptail.
I'm not sure if the link will post but if not i am buying my fish from Coburg Aqaurium. Unless anyone has good sources for fish in australia?

 
Catfish seem cool. Are there any predatory catfish? The striped raphael almost reminds me of a mirror carp

Well, yes, but most are much larger than what would be appropriate for your tank or pond. Striped Raphs aren't predatory from what I've seen.
 
Crikey...they are only like $8-$30 around here; Aussies are millionaires over there, lol.
Yeah lol. What do you think about silver perch as a choice for a 220L tank?

 
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