Documenting how i replaced cartridge filters for my RO filtration system.
WHEERF Filter on Amazon: http://amzn.to/1QxdD5t
WHEERM Filter on Amazon: http://amzn.to/1MXiU41

TDS Meter from Amazon: http://goo.gl/i5qge
Wiki TDS: http://en.wikipedia.org/wiki/Total_di...
Owner manual:　
http://www.ecodynewatertreatment.com/...
http://www.manualslib.com/manual/2669...