I can give you a few data points that I have logged in the past. I have a T-15-Cell.

87 degrees, 3000 ppm salt, 26 volts, 6.30 amps.
100 degrees, 3000 ppm salt, 25 volts, 7.2 amps.

So at 90 deg, 3500 ppm, the amps should be higher than 7.

What cell are you using?