Hello, i am asking for assistance in verifying what equipment i will need for a under the gravel pump/filter. Please excuse my ignorance in the terminalology regarding aquariums.

I have a 30 gallon set-up that we used to use for hermit crabs but long story short we have cleaned it and are going to start up for freshwater fish. I am looking at the components for what i need and here is what i have compiled on my to buy list:

Aqua clear multifunctional water pump (for up to 50 gallons)
Top Fin uplift tube
Topfin Undergravel filter

What other components do i need? I know i am missing some stuff but i wanted to verify with some knowledgable people what exactly i need. Thanks in advance for your response!