How Many Gallons?

[Maduro]

210 would be my vote (minimum)

 

[DMD123]

How many gallons would I be needing for the following fish when they are fully grown?
2 oscars, 1 severum, 1 green terror, 4 bala sharks, 1 knife fish and maybe two more same sized fish?

The Knife can not be huge type like a Clown or Royal and the other two "same sized fish" can not be very big; you might be able to do a 180g with heavy filtration and water changes.

But that being said, I personally would recommend bigger. Like most are saying over 200g.

 

[quintas14]

You've got 6 fish there that'll be @ the 1 foot mark and 2 @ 8", and going on just that I'd say 240 as a minimum size. Then be ready to either upgrade or re-home if aggression due to territory rights arise...

 

[littlewangzfan]

In response to RLHam3, it's a ghost knife sorry I didn't specify. They are juveniles in a 90 gal growout right now. I think I can go with your advise for a 240 or more because a friend of mine gave me a 3/8 thick 6ft L x 20" H piece of glass. The reason I asked is because I'm planning to build a plywood tank with that glass. I already built a 120 gal ply tank and so far it's running ok. It's just that I still don't know how to post pics here, I could use some help with that please. I will be asking for more advise when I start my build, I still have to clean the glass of calcium deposits. Thank you.

 

[Kyle_91]

210 should be plenty IMO. you dont need anything outrageously huge...

 

[xinchavoc]

210 should be plenty IMO. you dont need anything outrageously huge...

if he gets a clown knife he will need a huge tank over 300 clown knives get like 3 ft

 

[Kyle_91]

if he gets a clown knife he will need a huge tank over 300 clown knives get like 3 ft

yea, in the wild...

 

[xinchavoc]

yea, in the wild...

ive seen some pretty big ones on here.... even if it only gets 2 ft it will still need a 3-4 ft wide tank....

 

[xinchavoc]

heres a pic f a 30'' one belongs to a member on here so yea they should reach about 3ft in a proper sized tank

ohh and they get over 3ft in the wild

 

[Jc1119]

I'd say 240 min, but if you're gonna do that you might as well do a 300. Same footprint 6" taller. That's what I'm in the process of doing myself