When should I change my various rodi filters? Tds is at 1

[Biff0rz]

I have a 5 stage with a 2nd ro membrane so I get 150gpd rate. My pressure normally runs at 75psi. I noticed its running at 70psi. The tds meter is now reading 1 on the output. The di resin is about half used. The last filter which is normally all white is a shade brown.

Do I change all of them (no the ro membranes obviously) but do I change the carbon filters too or when do I change those?

Last change of all filters was 7/15.

Thanks!

 

[WIReefer]

Do you flush your system before every use? Once mine reaches 2 tds I change them, if it’s at 1 I keep her going. When I change one I change them all.

 

[Uncle99]

I’m good to 5ppm.

 

[Biff0rz]

Do you flush your system before every use? Once mine reaches 2 tds I change them, if it’s at 1 I keep her going. When I change one I change them all.

I do flush every time. I run it about 10m or so. The tds meter will show less than 5tds on the incoming side.

 

[WIReefer]

I do flush every time. I run it about 10m or so. The tds meter will show less than 5tds on the incoming side.

Okay that’s good, personally I change mine when it reaches two. And I change them all out.

 

[haitian_reefer]

I change mine at 1.

 

[Fishingandreefing]

I change mine at 3 tds. Sediment and carbon usually 5-6 months. Ro should be 1-2 years and the DI when the color is all changed.

 

[Fishingandreefing]

But mine is the aquaticlife

 

[DC Reefer]

I usually end up changing the sediment filter (white one and should be first one water goes through) about 2 times to every change of the carbon blocks. Once I change it will usually increase my water pressure some.