Hi Senthil, welcome to FishLore! It's great to have you with us, and hopefully we can help you have a great experience in the hobby. Please go to the beginners forum and read the stick called, "FishLore Articles for Beginners" It's a great start in learning what you need to know. Please make sure you understand cycling completely. It is the most important concept you will need to understand to be successful in keeping fish. Also, near the top of your screen, you will see a link "FishLore.com: Tropical Fish Information". If you click on that link, you will find all the other information this site has to offer to help you out. There's a lot more here than just the forums. So, get to reading, and hope you enjoy the site!