RODI unit tds

[valley]

Hello, I have had my brs 4 stage 75 gpd since December and so it has been about 6 months. I’ve been using it more often than usual because I just set up a 60 gallon tank with live ocean rock and I’ve had to do big water changes. Now that I’m using it again today I’m noticing that the tds of the water coming in is 3 and the water coming out is 4. I’ve let it run for some time and it hasn’t changed. I just used it last week and tds was coming out as 0. I always make sure to flush the unit before and after use. Does this mean I have to replace the filters?

 

[lapin]

Your tap water is 3?

 

[Malum Argenteum]

Presumably, 'in' and 'out' are referring to the DI canister. If so, then the DI media is exhausted and needs to be replaced. Once the TDS on the final product water (that is, the water that comes out of the DI canister) is greater than zero, I'd replace the DI media.

 

[2Plus2]

Your tap water is 3?

LOL, i thought the same... I was like what da hell that's beautiful.

 

[2Plus2]

Hello, I have had my brs 4 stage 75 gpd since December and so it has been about 6 months. I’ve been using it more often than usual because I just set up a 60 gallon tank with live ocean rock and I’ve had to do big water changes. Now that I’m using it again today I’m noticing that the tds of the water coming in is 3 and the water coming out is 4. I’ve let it run for some time and it hasn’t changed. I just used it last week and tds was coming out as 0. I always make sure to flush the unit before and after use. Does this mean I have to replace the filters?

Like mentioned above we assume this is your DI section, if so replace the media.
Has the color changed? It usually comes with color changing resin to warn u, also make sure your TDS prongs are rotated to its proper position to give u a proper reading.