I recently purchased and installed 2 2.5 cubic foot backwashing filters with fine calcite media. The purpose of a 5 cubic foot system was to also handle the requirements of my irrigation system (8 to 10 GPM).
I also purchased and installed an aspirator that is located before the expansion tank, which is the largest tank that well Xtrol makes for residential. Before the aspirator, I have a 60 mesh filter to capture large sediment.
Currently I am working off of 1 filter as I am not irrigating at this time. I have 2 major issues. First, my water is worst that it was with my old filter. It seems that the iron is not only staining, but I can actualy see the discoloration in the water. Second, I aspirator has very small openings that greatly restrict the water volume. On backwash, my pressure drops to aroun 32 PSI. It is generally between 55 and 65 PSI.
I spent close to $2,000 for the system and am very disappointed. I have not heard back from the person I had dealt with. I would like to understand the issues with the system they sold me prior to speaking with them.
These are the facts: 3-4 ppm of iron. 2 grains of hardness and 6.0 PH before the filter.
I think the issues I have are twofold. First, I believe that a large portion of the iron is oxidizing AFTER it passes through the filter. The hot water is worst than the cold, which leads me to believe that additional oxidation is occurring in the hot water tank rather than the expansion tank.
The second issue is related to the aspirator. I do not believe that this process will work with my system due to the restriction in water flow.
From the research that I have done, it would seem that I should have installed a chlorine injector rather than an aspirator. The chlorine almost immediately oxidizes the iron which would allow for it to be filtered out through the backwashing filters. I also believe that their flow rates are much higher than an aspirated system.
The final question. Is fine Calcite the media choice for low PH, manganes(level unknown) and iron filtration, or should there be some other media in the tank as well? I want to avoid cartridge filters as I believe that the system I have should do the job.