At 340 PPM for hardness (20 grains per gallon) and having iron content that is almost 5 times normal you will most likely need a green sand filter too or something to take out the iron in addition to the softener. The Calcium, Mag and Manganese are high but the softener should lower their levels too.

I doubt that just a single water softener system will take care of everything, it might have to be a 2 part system.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).