The hydrosponge has a slotted center for water to circulate through. If only you're using the 1" tubing (or something similar) for the center of the sponge holes in the tube will allow water to circulate the same way as the slots.
If you want strong filtration use a powerhead for the sponge rather than an airline. I use the penguin reverse-flow replacement sponges inside aquaclear quickfilter housings and on all my hob
and canister filter intakes to keep them from getting clogged with duckweed or other plant debris.