I am a new pool and spa owner. I dont know a lot of stats...the spa in this case is a 4 person in ground spa. Not sure that matters for this convo. Ask questions if needed, and I will try to answer them. i use a pentair 5 solution test to test the water. Chlorine tests good, pH seems to be good as well, always testing right in the ideal area. when I do the alkalinity test, it seems high. It always takes 20+ drops to change the color of the liquid. Is this something I should be concerned about? We have tried to add some muratic acid, but it doesnt seem to change it one bit.