TDS level from RODI output

[6 man reef]

At what TDS level would you replace the filters?

 

[rigleautomotive]

i usaually change at 2 TDS measured after the di

 

[NCguy]

I wouldn't go over 10 but I've seen some people say they have as much as 35 before they change theirs.

 

[rigleautomotive]

not good for sps corals with that high TDS.maybe soft corals or lps

 

[6 man reef]

Thanks everyone I am getting a reading of 6PPM I will order replacements.