Back in September I aerated and successfully lowered my TA to 80 in response to some useful guidance in this forum. I still test weekly, and am now wondering if I should be concerned that my TA is getting too low.

Here are my results from this morning:
FC 3.5
CC 0
TC 3.5
pH 7.5
Alk 70
Cal 450
Cya 45 (this has lowered from 60 back in the summer)
Temp 49
Salt 3200

Typical results from the fall:
FC 8.0
CC 0
TC 8.0
pH 7.6
Alk 80-90
Cal 470
Cya 60
temp 69
salt 3200