Yes, antiscalant filters can indeed become clogged over time. While the primary function of the water filter media inside—such as polyphosphate balls—is to provide effective scale inhibition, the filter housing itself can fall victim to other water quality issues.
Suspended Solids: If the water entering the filter contains sediment, rust, or other particles, these can be trapped by the filter screen or the polyphosphate crystals themselves.
Iron and Manganese: High levels of these minerals can oxidize and form precipitates.
As part of their designed operation, slow-dissolving polyphosphate balls gradually erode and can break into fine fragments.
The moist environment inside any water filtration system can promote bacterial growth.
In extremely hard water, if the scale prevention media is exhausted, limescale can form within the filter housing.
Use a Pre-filter: Installing a sediment pre-filter is the most effective protection.
Adhere to a Replacement Schedule: Follow manufacturer's guidelines.
Monitor Water Quality: Understand your water composition.