tds

[werp]

My tds meter reads 127 from the tap and 032 from my ro/di unit. Do I need to replace the filters or is this acceptable? The unit is less than 1 year old. I need to start making water for a new tank and dont want to start with algae problems.

Thanks

[JimD]

I change my sediment and carbon filters when tds reads 003... Youre way over due! The more often you replace filters, the longer your membrane will last...

[Pacman]

My tds reads 10-12 post RO, but I'm starting out at about 325 tds from the tap. I also use DI to get the tds close to 0. I'd think you need to replace the carbon and sediment filters at least.

[don-n-sa]

can you test the water from just the RO? My unit has an RO only valve so I can isolate which filters need to be changed.

my tap is around 320tds...after RO is around 7 to 10...after DI it is 1 to 3 tds