Hi BettaGirl. This was my first tank and I was stupid enough to not research the topic before I rushed out and got the tank and fish. (It was cycled for a week though). I have learnt that I am overstocked as my tank is only 10 gallons (US). Tomorrow I am sorting this though as I have arranged with my LFS to take the 12 fish back in replacement for a male Betta. Luckily enough the tank I bought is designed for Betta fish! You may have seen from posts I have written yesterday that I've already been asking about the necessary needs! haha. Thanks for showing an interest for me and for viewing my page!