Hello everyone!!! For christmas my sister gave me a Betta with a 2.5 gallon start up tank and conditioned water. Sadly to say my fish died three days after I brought him home. This event made me look into the proper way of keeping a fish tank. I've purchased a few books (Your Happy Healthy Pet Betta & Aquarium Plants) and have done some research online. This has all lead me to purchase a 20 gallon tank and I plan to have live plants. I want to purchase another Betta but I am going to need some help. I'm not sure what the proper filter would be for this kind of tank. I've purchased a submersible heater, digital thermometer, plant food tabs, CO2 system for my future plants, along with substrate, and lighting. I'm still not sure if I need any type of aeration device (maybe a whisper 20). Any helpful advice would be greatly appreciated. Once I have my plant system going I will look into getting a community tank thriving with my Betta.