u/J1Helena

I have an under-sink System VII system that includes an alkaline cartridge. Here in Vegas, the city water tastes vile. It's also extremely hard, and I have a separate water softener. I use the RO water for drinking and coffee as well as some cooking. Still, I find that the water has an "off-taste." Is there a way to upgrade or improve my system, such as by adding a cartridge or using different cartridges? Thanks.