It sure seems like my pH typically swings upward throughout the whole day rather than following the traditional thought of peaking at mid afternoon. I wonder if night time aeration in conjunction with 12-20" secchi is causing this? The swing seems to be minor and I can't help to think that the blooms are struggling after a night of being turned under and continue throughout the day without a peak of their own. IDK, just speculating.
Just adding this last weekends readings...
Latest readings from Friday & Saturday (air from 9pm to 10am):
Friday evening's DO readings (at dusk) -
6.5 ppm at the surface,
5.2 ppm 1 foot down,
4.3 ppm 2 foot down,
4.1 ppm 3 foot down.
Saturday's readings -
Time - 8am in BOLD , 1pm in RED, 6 pm in GREEN
Ambient Temps - 74 F, 80 F, 77 F
Secchi Disk Reading - 21" all day long.
Water temps - Top to Bottom 76 F, Bottom 76 F - Top 79 F, Bottom 76 F - Top 78
DO - 4.3 ppm from surface down to 3', 6.3 ppm @ surface, 5.5 ppm - 12" down, 4.7 ppm - 24" down, 4.4 ppm - 3' down, 9.6 ppm @ surface, 6.5 ppm - 12" down. 4.5 ppm - 24" down, 3.8 ppm - 3' down
TDS - 52 ppm, 53 ppm, 53 ppm all taken at 12" deep.
pH - 6.9 @ surface, 6.7 - 12" down, 6.6 - 24" down, 6.5 ppm - 3' down, 6.8 @ surface, 6.6 - 12" down, 6.3 - 24" down, 6.4 ppm - 3' down, 7.4 @ surface, 6.7 - 12" down, 6.5 - 24", 6.3 ppm - 3' down
Ammonia, Nitrates, & Phosphates - all zeros throughout the day.
Sunday 6pm DO readings -
Cloudy all day with some rain and light winds.
5.5 ppm at the surface,
4.7 ppm 1 foot down,
4.4 ppm 2 foot down,
3.9 ppm 3 foot down.
