i did not take time to read the whole thread, sorry in advance, as im sure many have said just maintain your system right. its going to be a lot less work then hauling in water. I acutally find it fairly amuzing that you are willing to truck in water over just doing the maintenace. I think you mentioned the crystalizing of the soda ash being a problem. it is used to bring up the ph to make the iron removal process work. if soda ash is a problem then switch over to caustic soda solution, you'll need two injection pumps though. if you want easy and have some hardness in your water look into a sanitizer series filter you can get them to adjust the ph remove up to 15ppm iron and take out hardness. I would not reccomend using air injection on high iron water, as described in the article, cleaning out those tanks is a pain and you will have bacteria issues after. Also i would find out what media is being used to filter out the percipitated iron as there may be better choices.