Well, after putting in some serious thought and contemplation, I'm debating changing some of the equipment again. My final goal of this fish tank is to house a few small fish and a fantail goldfish. That being said, here is what I have decided on. It will be about a week before I order the equipment, and then I will post new pictures before and after adding the fish.
AquaClear 50 HOB filter (I would need to order this. This would be to replace the Tetra Whisper EX70 which is creating too much flow.)
Tetra 20 Gallon High glass tank (I already have this.)
Petco Newport 20 Gallon High tank stand (I already have this.)
Perfecto 24" glass canopy (I would need to order this. The aquarium doesn't have a lid and it needs one.)
A clamp lamp and a 6500k CFL spiral bulb from Home Depot (I would need to order this. This would replace the Tingkam 57 LED 50cm White Color 6000k-6500k Submersible Aquarium Light, which is far too bright.) NOTE: The Tingkam light was very cheap and worked very well, but it is too bright for my living arrangements, so if you're looking for a cheap lighting solution and like bright lights, you should give it a look.
Tetra Whisper Air Pump 40 (I would need to order this. I don't have an air pump for the aquarium and need to get one.)
Uxcell 18" Bubble Wall Tube (I would need to order this. I think it would be a nice way to oxygenate the tank.)
...and miscellaneous equipment.
Fantail Goldfish x 1
Small Fish x 2 (I'm looking into this.)
I still won't need the heater that I purchased which is pre-set at 78F. Since my ultimate goal is cold water fish and my apartment is around 65-70F, I shouldn't need a heater at all. I don't want substrate in the aquarium, in case you're wondering why that wasn't listed. I already have the tank, stand, and plants, which is going to save me some money.
What I learned so far:
This is a super fun hobby that can be expensive if you purchase equipment that you don't need, as I have, and if you decide to change your mind on some tank specifics during the process of setting up the tank, which I have also done. This is what I'm going to stick with, though.
Any feedback? Pictures will be posted in about a week!