Doing water changes with RO/DI water from what I understand, lowers the calcium in the tank
I haven't heard that one before. Newly mixed SW
has around 400 ppm Ca
. It's not enough to maintain the Ca
unless you have very little Ca
If you keep the inlet pressure high to your RO
membrane, you will get increased efficiency (less wast water, more RO
/day). You may want to use a pump designed for this unless your house pressure is high enough. At my house it is 80 - 100 psi so it's not an issue.
If the RO/DI is new you should not use the product water that is produced for the first several hours
Why is this RR? I was showing 0 TDS
after a few minutes. Are there assembly lubricants or something that needs to be flushed out?