Maybe this is a diatomic filter? They are used for short periods of time to clarify the water. They are usually not connected directly to the main filter, but this could be a special setup, since the diatomic filter has its own strong pump as well, so it could work inline.
sorry but I don't know the exactly type of the clarifying material they use. But they use it only few hours for clearing the water not for long time.
Regards,
Oliver
E Franklin
01-Jun-2005 21:58
Hello
please would you be able to advise on one of your pictures
I have noticed that MR Amano appears to be using an in-line water clarifying cylinder. Please could you advise what type of resin/filter material is being used. Presumably this does not filter out any iron or trace elements but is purley used periodically to remove organic staining.