The filter warning light is typically attached to a float in your upflow filter. If this light is active it usually means the upflow filter is in need of service. This filter contains a gravel media that needs routine cleaning and maintenance.
by slachapelle
The filter warning light is typically attached to a float in your upflow filter. If this light is active it usually means the upflow filter is in need of service. This filter contains a gravel media that needs routine cleaning and maintenance.