IMHO
I personally have a CA of around 350 and had an ALK of 200 and had no real problems. I have lowered my ALK to around 90 due to acid usage. The only real issue I have with a high CA is a haze that forms in the water from CA precipitate when my pH goes up to 7.8 of greater. If I remember you have an AG so it’s a vinyl liner so no issue there and if your hardware is stainless steel no problem there. I guess the only thing you could do is drop your ALK by aeration but being in MN it might drop your water temp too low for swimming. If your water is clear and inviting I personally would not get too worried about it.
Steve