Tank trouble!!

[Aquattro]

Jamie, alk is at 4.1 mEq/l, clam has been there for 3 months.
Ca - 420 ppm
Temp - 81 C
pH - 8.3 average last time I checked a week ago.
A/N/N - 0/0/0ppm
No additives
No other changes from normal routine.

I can't test pH of my reactor effluent due to test kit limitation (7.4 min).
Calling Allen for a pinpoint today.