If pH is too high, you can get scaling in your water which could damage your acrylic surface. If pH is too low it will damage any metal parts in your spa components such as heating coils, pumps, blowers, etc.
If pH is too high, you can get scaling in your water which could damage your acrylic surface. If pH is too low it will damage any metal parts in your spa components such as heating coils, pumps, blowers, etc.