Hi Maria, Difficult to say ...

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Hi Maria,

Difficult to say with few information. The anthracite is relased from its filter that is for sure, the roots can be various.

Maybe topics should be splited into 2 pieces : Particles clogging your cartridges :

- Erosion/attrition during backwashed followed by a too short rinsing time ? Fines particles get through the nozzles of the media filter.

- What about if one or more nozzles are damaged ?

- The anthracite haven't just been replaced and has been badly rinsed at first start up ?

SDI values :

- Is there a risk the pretreatment is failing performing well ? raw water quality have changed ? 

I assume, you do not face this since a major modification/maintenance/operation on your water treatment plant or is there a risk something has changed ?

Best regards,

Olivier