I've a few (6) Silver Sharks that I've had since they were tiny little
things.

They're now about six inches long and bulky and have fairly obviously
outgrown the 5 foot tank they have. Every little fight and squabble now
leads to water coming over the edge of the tank, and they're just not
comfortable.

Firstly how big can they get ?

Secondly what size tank would seem sensible allowing for growth ?

Thanks

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Edward Cowling Vote for Ken - Give him a third term !!