I would buy resin and gravel to rebed system 2. You can leave the carbon out. You can it from a lot of online dealers or find a local water treatment dealer and ask if they sell resin/gravel. As for system 1, it may be as simple as debris stuck in the venturi. Is the timer working? Does it complete a regen if activated? These units are made by Fleck which is a very good valve. A pic would be good.