TDS level

[rnhrtfan]

What is an acceptable TDS reading before you should change your R/O filter???? Mine is reading 001 PPM and has been since about 2 months after getting the unit (about 8 months ago)....

 

[LtPiper]

mine still shows 000 after two years.... anywhere from 5-10 I would start to look at changing DI or the filters.