The chemical abnormalities relate to the type of stones that form in the kidneys. These four types of stones and the chemical abnormalities that cause them are: Calcium Stones: people who form this type of stone either have too much of one type of three chemicals in their urine, or not enough of another.
Therefore, we recommend replacing your refrigerator's water filter typically every six months or when the gallon capacity is reached. We offer compatible replacements for Whirlpool refrigerator water filters, Kenmore, Frigidaire, Samsung, LG, Maytag and other popular refrigerator brand water filters.
Tips & Warnings. 1  Change your filter at least every 90 days. This will keep your airflow at adequate levels. 2  If you have pets, check all your return air registers to see if they are clogged by pet hair. 3  If cutting into sheet metal plenum, be careful not to puncture your evaporator coil.