this isnt exactly the right post to say this but in reply to what has already said i'd like to voice my opinion on betas.
1stly, i hate the way most people keep betas. just becasue they can survive in cramped and badly looked after tanks and bowls doesnt mean that they should be kept this way.
my betas, male and female swim about lots. during the day they will explore almost every single inch of my 40g tanks. occasionaly they rest on the bottom or next to or in between plants.
it is true i believe that they come from mostly still ponds and that they probaby dont like strong currents. my tank has varied current. near the input the current can be quite strong, but most of the tank the current is slow to almost still. i have seen my betas swim in the strong current occasionaly, so they can do it, but most of the time they stick to the stiller parts.
to finish i think a lot of people lose their betas sooner than they should because the beta is depressed and probably stressed and thus prone to disease. if betas are kept in bigger tanks, 10g upwards and provided with nice clean water and an interresting enviroment then they are much happier and will live a lot longer and look a lot nicer.
sorry to jump on my soap box but it is only becasue i care about the well being of captive fish
