Rec on good carbon filter for 5x5 tent

I am setting up a 5x5 tent inside and looking for recommendations on best carbon filters/ air scrubbers to best fit this set up. Any good deals you are seeing on filters? I've got an inline fan and plan on running carbon filter > Closed lid HPS > outside of tent.

pal

What size fan do you have? I like can-filters. I use them in my rooms and they work great. Just go on their website and size the filter for the size fan you have. Make sure to get the matching flange from them for your fan too