I do know that the 20 gallon will be quickly outgrown but it was a freebie from a friend and I need the time to save up for a massive tank. I rent so I don't have a pond for them and wont until I settle down, at which time I'll dig the thing myself if I need to! Following further observation I do think they can handle the current. They're generally out and about in the tank, it was just when I got close that they ran under the filter. They're getting over that though thank goodness! This whole thing was started because I had a childhood vendetta to win that dumb carnival game and take home a goldfish and I acted before I thought. About $200 later.... I am now a fish hobbyist. Why is it a hobby and not just keeping a pet? I love all my fish dearly, just as I love my dogs. Thanks for the suggestions everyone! This site has been insanely helpful.
1 halfmoon betta (Smaug), 1 african dwarf frog, and 1 black mystery snail (Hodor)