I used the new thermometer and at first it read at 72 and then at 73. so the thermometer in the tank is off about 1-2 degrees not 3-4. So looks like I pretty much cooked my shrimp at some point. I did some more digging around and read that higher temps is better for breeding but it's also a big welcome to death. I experienced both as my shrimp were breeding like crazy and then disappearing/dying.
Will shrimp breed successfully at the lower temp? I'm going to assume it may take longer.