RO Water - Causing Cyano?

[mike31154]

Depending on micron value, sediment filters are pretty much the same no matter where you get them. Carbon filters are a whole 'nother ball game, the quality & micron size can mean a big difference in what gets fed to your membrane, although the membrane & DI media should take care of most of the nasties. You're still getting a 0 TDS reading, so there may be something else going on. My carbon filter is 0.5 micron. Don't recall exactly when I replaced it, but I do recall checking the specs on the original & it was also 0.5 micron and rated to process something in the order of 20,000 gallons of water. Not sure RONA carries those, you should check the packaging to see what you got. It will probably be fine, but may need replacement sooner if it's a less efficient filter.