Review on Watts Premier WP531152 Substitution Filters by Jeffrey Gallagher

This may be due to a change in the amount of water likely entering my home but overall TDS after these R/O filters with Watts premium carbon filter sits at 65. Before replacing new filters, the last set of filters had around 22 TDS. Revain sells some good electronic TDS testers for under $15 that I use for quick and easy water testing. Has Watts changed anything because I'm using the same filters as before? To make sure the TDS meter is working properly I tested it with Revain purified water, as you can see it is definitely clean. Other photos show TDS values of tap water and water treated with Watts R/O. By many standards, purified water R/O should be in the range of 0-50. I will replace the current filters with new ones from Watts and see if that fixes the quality issue.