All good suggestions everybody.
My suggestion was based on the assumption Neo will be using a mesh pre filter, like we are all doing mostly. This is a shrimp tank filter, right?
The mesh prefix filter not only stops shrimp being sucked into the filter, it also minimises large debris clogging the coarse sponge.
The blue coarse sponge should stay unclogged for a long time.
And Substrate pro is a good bio media. I didn't dismiss it completely, I suggested using it after the marine pure, to close the gaps.
Neo, in case you didn't know, your filter intake NEEDS a prefilter. Mesh or sponge. To stop shrimps being sucked in. But it will also stop large debris.
If it was a fish tank with no prefilter, I'd set it up differently, with the rings first > blue sponge > white sponge > fine sponge > marine pure