The weather has warmed up here. For the past 2 weeks it has been above freezing most of the time. The 5 gallon filters have been running for 2 weeks. The output on all; 10a, 10b, and 10c; has cleared up considerably. If the above freezing weather holds for another 2 weeks, we will do another test on the outputs of each.
Although the outputs have cleared up, and it looks as though these small shallow filters may work in a somewhat limited fashion, it must be realized that the flow rate on these filters is very, very, very slow. Much like a dripping faucet. They will not function at all with a rapid flow. Do not confuse these filters with the type of device you might see used with pressurized water from a kitchen faucet, or filtered water that flows from a refrigerator dispenser. You can’t just pour water in a slow sand filter and have it come “flowing” out magically cleaned and pure to fill a glass in just a few seconds. We are talking 3 or 4 hours here to provide even one gallon of water. Please see the extensive post we have on these small filters for more information. We have been working with these 5 gallon filters for nearly 4 months now, and with larger versions for 7 and a half years. There is a tremendous amount of information.