Hi, I am planning to get a 20 gallon tank for these fishes:
1 Betta, 3 Guppies, 4 Cories and 8 Neon tetras.
But there are several problems/questions I need answers to:
First, I saw two 20 gallon tanks, one is longer and one is taller. Which one should I get? (The longer one is my cousin's, so if it is better I'll get it for free)
And what type of filter, lighting, ornaments, plants and heater should I get? (The ones that fit for every fish mentioned)
Lastly, is the fishes appropriate for the size of the tank? Is it overcrowded, if not, can I add more fish?