If it were me, I'd buy a skimmer instead of the reactor, considering how limited you are on space in such a small tank, especially If you want to carbon dose as a means to reduce nutrients. You can just buy some carbon dosing products alongside the skimmer.
But to answer your original question, according to Lou Ekus from Tropic Marin, you can carbon dose without running a skimmer. He has explained it during a MACNA conference on the BRSTV youtube channel and during a video on the ReefDudes channel. You should check it out.
But to answer your original question, according to Lou Ekus from Tropic Marin, you can carbon dose without running a skimmer. He has explained it during a MACNA conference on the BRSTV youtube channel and during a video on the ReefDudes channel. You should check it out.

