The bigger tank will be easier to maintain then 3 small ones , as for illnesses , I keep my betta ' s both in 30 G communities with mollies platies and cories , I ' ve honestly never had a sick fish but if I did I would just treat the entire tank anyways , never been in to quarentining except with new fish . So I personally don ' t think there ' s much to worry about that you wouldn ' t need to worry about anyways . There might be other users who have had problems that might chime in with better advice but I say go for it . <| sep |> They became the baby boomers who just elected Trump . <| sep |> Lord of the Rings The Two Towers ! <| sep |> Mark Sherry if you like bangin trance <| sep |> Fastest is for you to ship one of them to my address . 3