So having recently cut down to 2 tanks, and deciding that 2 is indeed the perfect number of tanks, I started reading more about bettas, in particular the threads from Ny82 and RCA.
Having realised that 2 spare filters and 2 spare heaters (form now closed down tanks) is a little silly, I found myself buying a new tank this morning, and have got it all ready for a new betta.

Oops.
It's a fluval U2 filter, which I'm guessing is a little strong for a betta but I'll turn it down to the lowest flow possible - this should be ok, right?
Also the tank is only 17 litres, is this sufficient for a betta? I understand they don't move around much so don't need loads of swimming room?
Finally, it's as basic a tank as you can get, and has no light in the hood - but lights are there more for human aesthetics than fish welfare aren't they?
Can you confirm that the above is all ok before I go and buy a fish please?
Everything in the tank has been stolen from my others so is 'worn in', it's literally only the glass tank and plastic lid that is new.
Also - I've never really seen any bettas in my lfs that have caught my eye much, but am scared of receiving a fish through the post - any advice on how to get a lovely looking fish?
Having realised that 2 spare filters and 2 spare heaters (form now closed down tanks) is a little silly, I found myself buying a new tank this morning, and have got it all ready for a new betta.

Oops.
It's a fluval U2 filter, which I'm guessing is a little strong for a betta but I'll turn it down to the lowest flow possible - this should be ok, right?
Also the tank is only 17 litres, is this sufficient for a betta? I understand they don't move around much so don't need loads of swimming room?
Finally, it's as basic a tank as you can get, and has no light in the hood - but lights are there more for human aesthetics than fish welfare aren't they?
Can you confirm that the above is all ok before I go and buy a fish please?
Everything in the tank has been stolen from my others so is 'worn in', it's literally only the glass tank and plastic lid that is new.
Also - I've never really seen any bettas in my lfs that have caught my eye much, but am scared of receiving a fish through the post - any advice on how to get a lovely looking fish?