My frigidaire frig has a problem with floating black seaweed looking pieces (mold?) that come from both the water dispenser and the ice maker. I am the original owner of both the frig and the house (4 yrs old) and have always replaced the PureSource2 water filter when the frig indicated it was time. I added a whole house filter on the main house line to stop the frig filter from getting clogged from hard water which solved that problem, but did nothing to stop the floating black pieces. The frig filter would ask to be replaced after 1-2 months with only two people in the house, so hard water was a very big issue. The faucets do not show any issues when I clean the aerators, but the shower heads with rubber tits and the washing machine rubber door gasket show signs of darkening due to mold. Is there I way to clean out the frig line, will this help and will it come back? The problem is not new and we just lived with it, but seems to be worst than before. What can I do to stop it?