tank size for...

[Naos1984]

One with a width >24" and longer than 6' preferrably plus a lot of filtration like 6x minimum turnover.

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[PDRed302]

Gallonage is pretty irrelevant in this situation. Footprint would be the issue. Personally I would do atleast 72x30 for a minimum footprint.

x2

Bderick hit the nail on the head when he said to buy a tank for the knife and the O's would fit.

Clown Knifes get huge, I would suggest an even wider tank. The 72x30 mentioned above was most likely a reference to a 240 wide. I'd go even further and say that you needed a 280 wide: 72x36x25. Even larger of course if you have the space.

Good luck with the tank and make sure to post build pics when you get it set up.

 

[claude3rd]

Tank: 250+
Filtration: (2) FX5s and 60g sump
Lots and Lots of water changes...

 

[oscaroo]

What are the dimensions on the tanks you list? I hope you wouldn't stuff these fish in a standard 150 (72x18" footprint)

I meant 150 60x24x24, 120 48x24x24

 

[Jamesy]

130? No, I'd easily be looking at 200g's Minimum