Others have made the correct distinction between TDS and TSS. TDS is only measuring ionic dissolved solids and doesn't reflect dissolved organic content as well as the suspended solids.
What is key here is TSS is really easy and cheap to clean up when compared to TDS.
A centrifugal strainer...
In addition to one time cleaning you want to use Rust Out/Iron Out with every regeneration.
Iron is difficult to clean from resin. Using resin cleaner at low levels in every regen and also making sure you are salting correctly makes a big difference.
We try and low salt, 4-7 lbs of salt per...
My gut feel is low pH. We see this a lot when people try and do whole house reverse osmosis which tends to leave a lower than neutral pH. Also with well water customers that have a low pH.
I would start with a water test. Many overlook the LSI, langlier saturation index.
High chlorides can...