First things first, AWESOME Website and Forum! Excellent job, lots of info, Thank you! And thanks for the Pool Calculator! AWESOME!
Did I already say AWESOME?
Wife and I just purchased a house with an inground pool near Pensacola, FL . ~28,000 gallon.
Long story short, CYA = 140 so I am going to drain about 3/4 of the pool . I want to use lawn sprinkler/well water to save some money . Wellwater TA and CH are fine but iron is around 3ppm .
Because I am who I am, I had to inspect all the equipment and decided to replace my "cat poop" looking sand. Thats when I came up with an idea . The sand filter calls fall 225Lbs of #20 silica. My thought was to lay down 75Lbs of #20, 50Lbs of Manganese Greensand and then another 75-100Lbs of #20. Example product http://www.caitechnologies.com/image...manggreens.pdf
items that I have already considered;
If Mesh and Grit size are not closely aligned partial media loss is likely over time .
Requires a potassium permanganate (PP) soak and then a backwash every X# of gallons pumped depending on media capacity.
Items that I still have questions about;
Flow rate is too high for media . Will media still function but at a slower rate? (I think so)
Greensand is rated to reduce iron, manganese and hydrogen sulfide but will the media remove "Friendlies?
Will PP have any effect or impact on the silica? (I don't think so but figured I would ask)
Assuming satisfactory iron reduction, PP soaks/backwashes should become much less frequent dependant upon the amount of replenishment water. Would you agree or do you think the Media will suffer degredation due to infrequent PP soak/backwash?
Any suggestions on a separation/barrior between the layers so that if I determine the media must be removed I don't have to dump a lot of sand? I was thinking something like felt.
I have searched all over the forum and the net and have not found any examples or someone discussing such an idea so I would like to know what the people on this forum think. If you think I am crazy or off kilter (my 6 year old thinks so) please let me know.