Shane, I'm having, you might say, a bit of an epiphany here:Hello nice to meet you and thanks for your question!
I see good color and growth on all my corals at .25-.35 Range. I have 97% tenuis though LOL.. Most people have bad water quality in terms of TDS. that is the number 1 tenuis killer. I change my membrane on my RODI unit every 2 months. Most people change it once a year. I would start with that before changing any parameters. Most people don't change the membrane because they see 0 TDS on the meter. I still think something is getting through that is not showing on the reading. I have advise people on this before and they changed the membrane and saw instant results..
Going back to late summer of 2019 or there about.
Scene: Reefapalooza in Secaucus NJ.
Subject: I was talking to a vendor about reef husbandry. Specifically, it may have been about lack of polyp extension on my Acros. The vendor asked how often I changed my RO membranes.
When I mentioned that I consider changing when my TDS goes to 1 (usually a 2 year period, or more, for me) he suggested to change them every month.
He also mentioned to "burn" about 35 gallons of the water after replacing the membranes.
You don't have a twin by any chance? LOL