[New to forum - Greetings from Georgia!]

Thx Patrick. This is helpful. I am also considering a used Aq. From the market places to save money, so maybe those larger tanks are possible if a good deal is to be found. 

[New to forum - Greetings from Georgia!]

Hi friends!! 
I joined this forum to research my options to upgrade from my 20g tank to some thing a bit larger. I’m thinking up to 40g range. Photo is my 20g after initial setup in June 2018. I found Cory’s videos back then and learned a lot.  I’ve been away since then and it seems a lot has changed/grown in that time. For now, I will be surfing the forum posts for options on my new aquarium project.  I might setup a cichlid tank(?) but not sure. I also like the idea of a Disc or Angelfish tank.  I also want to update my filtration on my 20g and use the air bubbler sponge.  BTW - I am located near Atlanta GA(USA) and I look forward to your feed back.  
Cheers! -Mitch