i tried vitamin C dosing...meh seemed to make my skimmer work overtime, but didn’t really move my nitrates too much. i don’t have anything bad to say about Vit C dosing, didn’t seem to hurt anything. Have to say again, running sulfur in my old reactor has really zeroed nitrates, plus it knocked out my high alkalinity issue, good counterbalance. i test every so often, but seems a 10-15% water change every two weeks keeps everything in line. I might do a large 40% WC every 3 months or so.
Good luck
c