Well, I think I met with very limited success last night:
As I said above, I had guests staying over last night and that always causes a big pH drop. It looks like I still got the big drop, although it wasn’t as bad as normal. Normally it would get down into the 7.70’s, maybe even as low as the high 7.60’s. This time it looks like it bottomed out at 7.83, which isn’t great, but is still better than 7.68.
I think part of the problem is that I cut back my alkalinity dose significantly at night. During the day I dose 60ml, but at night I dose less than 30ml. It’s configured this way because the alkalinity demand is much higher during the day, but unfortunately the pH demand is higher at night. I could try to balance those numbers out a little and dose additional alkalinity at night which will help with the pH, but at the cost of making my alkalinity a bit less stable.
As I said above, I had guests staying over last night and that always causes a big pH drop. It looks like I still got the big drop, although it wasn’t as bad as normal. Normally it would get down into the 7.70’s, maybe even as low as the high 7.60’s. This time it looks like it bottomed out at 7.83, which isn’t great, but is still better than 7.68.
I think part of the problem is that I cut back my alkalinity dose significantly at night. During the day I dose 60ml, but at night I dose less than 30ml. It’s configured this way because the alkalinity demand is much higher during the day, but unfortunately the pH demand is higher at night. I could try to balance those numbers out a little and dose additional alkalinity at night which will help with the pH, but at the cost of making my alkalinity a bit less stable.