What is Reddit's opinion of Fleck 5600 SXT Air Injection Iron Eater Filter. Removes Iron, Manganese, H2S. Black Series. 1.5 cubic ft?

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First step is of course to get your water tested. Making the assumption that your on a well? We recently bought a new home that is on a well and had high Iron levels (about 6 ppm). We put in an iSprings spin-down pre-filter, then to an large iron oxidation filter, we used this one (https://www.amazon.com/dp/B07P67Y8CS/ref=cm_sw_r_cp_apa_fabc_wC76FbTDB8NK6?_encoding=UTF8&psc=1) and then to the iSprings 3 stage filter. And its working great. Crystal clear water. For us, the 3 stage filter alone wasn't enough to deal with the iron. Also, our grain level wasn't enough to worry about a softener, but the manufacturer of the oxidation filter make a unit that has a water softener built in.

1) samples are drawn from the kitchen tap. I am in frigid upstate New York and so well heads are 4 ft down. 20 gallon pressure tank with 5 gallon drawdown is inside the house. 2) the Culligan guy was secretive about his tests but the other people used titration. Number of drops added to the liquid equals the grains per gallon 3) I shocked The well few days ago with 5 gallons of bleach. We are barely using the water because it's a house under construction. Not sure how much water went through the system

4) many companies are selling AIO with different kinds of media, brim catalox , kde85, no media just ozone etc Some are online water stores that bombard you with Facebook ads but have no reviews and just one of them on Amazon with many many positive reviews. The Culligan he sulfur cleer has greensand. The local companies are selling AIO with ozone for $4,000/$2500 What's your opinion on just buying from Amazon? (I am a plumber) DuraWater Black Fleck 5600 SXT Air Injection Eater Filter. Removes Iron, Manganese, H2S Series. 1.5 Cubic ft https://www.amazon.com/dp/B07P67Y8CS/

5) what's your experience with combination of water softener and AIO sulfur filters?

AFWFilters IRONPRO2 Pro 2 Combination Water Softener Iron Filter Fleck 5600SXT Digital metered Valve for Whole House (48,000 Grains, https://www.amazon.com/dp/B075ZBKQ3G/

6) what's your opinion on water conditioner / descalers Why is everyone against it even though they're made by 3m, a o Smith and having high rating on Amazon from people with 24 grains of hardness Thanks much