I think the question was referring to having filtration at all. Guessing you just want to keep the tank with a skimmer for filtration? I know some people who chose to only use a skimmer and have success. Good flow is essential however the LR
will house the BB to break down ammonia into nitrite and eventually into nitrate. The skimmer will eliminate the nitrate organics... To an extent... You will want to add a phosphate reactor to this system regardless.
HOBs and canisters normally do more harm than good. I always recommend a sump coupled with a skimmer. So many options come with a sump from micro filtration, reactors, refugiums, to having the added water volume.
Considered the HOB
aquaclear refugium DIY mod? YouTube it!