I've noticed recently that my pH has been rising a bit faster than what it did last summer. Last summer I ended up keeping my pH pretty low to negate the rate of rise in the pH. My TA stayed around 40. Fast forward to now and my current TA is at 75 (result from last week) and my pH is rising pretty fast. I'll drop it to 7.2-7.4 and in just 2-3 days it's already back up close to 8. I had decided to aerate and lower it, so now it's currently at 60. Should I be concerned if I need to lower it back to around 40 like it was last year?