Extra Filtration for 28 Gallon JBJ Nano

[chromakey]

Good Day:

I recently purchased a JBJ 28 Gallon Nano reef tank a couple of months ago. I also switched from Instant Ocean to Reefer's Best Salt. I do a 4 gallon water change weekly. I have been talking with a few people about the different add on filters I can use with Nano.

I would like to get some input on what item adds the most to keeping the water clean.

Protein Skimmer (possibly the Aquamaxx HOB-1)
Reactor with bio-pellets
Reactor with GFO or phosphate remover.
Other type of filter.

Thanks for your input,
Michael