Welcome to TRT and thanks for suggestions. I have had a few Reeflos over the years.Stop your water changes as that feds them I would syphon as much out out and then go for a 3-5 day black out once all signs of-it have gone give 1 more day of black out then slowly lift light level up to normal..
Yep, no water changes, seem to be helping a lot. I did a 5 day blackout (lights out) and ramp lights a month ago and everything looks good but it all came back. My Nems took a big hit during the blackout and lost a lot of their color, even with feeding them.. I am planning on doing another full blackout (cover walls of tank with cardboard) but waiting for the Nems to have a little more color first.