thanks for that link! this is the one i was looking at earlier, i think im going to try it out but might have to buy some tools i dont have like the tool to tap. i should have everything else except the pvc

is it better to use this than something like vodka or sugar? i know with the last two you have to have a skimmer, but was wondering if they both worked the same or if adding a carbon source was better than setting up the denitrator?