New sediment filter in RODI unit is brown after making 25 Gal

[sbelyo]

Hi All...

I just changed my sediment and carbon filters in my 4 stage RODI unit. I noticed that the snow white sediment filter turned sandy brown after only 25 gallons. I don't remember it discoloring so fast whent I first got it. Does that seem normal?

I don't have a TDS meter, but I will order one next week just to check input and output. I suspect prior to me changing the filter I may have had a TDS issue and or phosphate issue. I can't get rid of the cyano even after weekly 20% water changes and cleaning out the sump. And now my one frogspawn has been partially retracted for a week now.

Phosphates and TDS were the only things I didn't have the ability to check. PH is 8.2, Nitrite, and amonia are 0. Nitrates are as close to zero as the API chart can register

 

[Gonzapa]

mine take a couple of months to get that bad. defenetely not normal

 

[mgargiullo]

That's about what mine does. My town is old as are all the town pipes. this also happens to me when the town flushes the fire hydrants. The last time I changed them I noticed that the brown wasn't fully through the filter. That said, the water coming in is only around 50tds.

Next time I change them out I'm going to add a 10 micron filter in front to catch the big junk.

 

[sbelyo]

that's a really good idea. I think I'll set up something like that

 

[SHLUZER]

Could the in pressure be too big ? then to get 25G you could've run thru 300G of water. ?