I have never used nitrate reactors, I find water changes to be easier, and most effective, and beside that, nitrate isn't the only thing I do water changes for, they help buffer acids (add alkalinity), and other minerals, and remove hormones etc.
Beside the water changes, I find emergent plant refugiums, Pothos, or algae scrubbers simply more interesting tools.

With my latest tank, I have put the sumps in half day direct sunlight, so they easily grow lots of algae.
So far using this method, aquatic submerged and floating plants, nitrate has been almost undetectable, the tanks small side panels get enough of that sun, so they are covered in algae.
