Using good ole well water

I'm using well water. EC is 33 and the is 6.8. How many people are doing the same and what are you doing so that it works. I'm using GH Trio plus all the supplements in coco loco ( at the moment ). Next grow will be coco, per lite based.

My water is always between 6-7 ph and quite low ec . If it wernt id most likley opt for a filter or some RO water

I've also noticed that a cup from the spigot and a cup from the gallon jug I mix nutrients in is different. Just filled the jug and without adding anything the EC was 68. Up from 33 from the spigot. Does anyone clean their containers before mixing?