Perhaps one of these? The one that's for 5-15 Gallon tanks looks like it would plug right into the built-in tube in the tank.
The one you posted looks like its meant to be under the gravel! I always put a sponge filter in my tanks!
I always do this one, as it is so tiny: https://www.amazon.com/dp/B07XZ831WR/ref=cm_sw_r_cp_apa_i_yyL.EbHEAN2MH
As long as about half of the sponge is above, it will get the job done! Its also easily hidden by a small/mid-size rock :) hope this helps!