Filter for 29 Gallon Turtle Tank

I'm looking for a filter for a 29 gallon turtle tank.
Here are my options:
Internal submersible filter:

(Fluval U3 filter. Do I need the U4? I understand the maintenance that I need to do about every week. But apparently it's pretty easy.)
Small external canister filter
]Zoo Med Turtle Clean Canister Turtle Filter, 30-gal
(This is the cheapest canister filter I could find. I wouldn't have to maintenance every weekend but double the price?)
I've thought about underground filtration but I don't really like it and I would have to have something else.
HOB filters don't work in the tank I want because the water line is only going to be filled 11 inches out of 18 3/4 inches. (The turtle species I want like shallow waters.
Musk turtles btw)
Sponge filters don't work either because the turtle might eat it.
I'm using sand as a substrate so please keep that in mind.
Turtles create a lot of waste so I'm stuck in a bad position
I'm kind of on a tight budget and would appreciate if the filter were under $75
Thank you!

 

Why don’t you get the 40 gallon tetra whisper internal filter. It’s amazing for turtle tanks.

 

Would the intake tube reach low enough?
Sorry I’m inexperienced with that brand of filter

 

Would the intake tube reach low enough?
Sorry I’m inexperienced with that brand of filter

Look up a picture, there is no tube.

 

Do you know if the filter should be only half submerged in the tank or does the whole things have to be submerged

 

With a low water line, I suggest looking at getting a pair of large coarse foam sponge filters.

Coarse foam will flow more water and catch more muck in the turtle tank, vs a fine foam sponge filter.

An airpump lw/ dual outlets like a Fluval Q1 or Tetra Whisper 100 would be a good match to run the pair of sponge filters.

PetSmart and Chewy websites will have them for under $20.