diff --git a/src/FermController/FermController.ino b/src/FermController/FermController.ino
index a33a80b..32e16c1 100644
--- a/src/FermController/FermController.ino
+++ b/src/FermController/FermController.ino
@@ -12,8 +12,8 @@
 OneWire oneWire(ONE_WIRE_BUS);
 DallasTemperature sensors(&oneWire);
 byte glycol_ds18b20[8] = {0x28,0xFF,0x64,0x0E,0x7F,0x57,0x09,0x66};
-byte fermA_ds18b20[8] = {0x28,0xFF,0x64,0x0E,0x7F,0x57,0x09,0x66};
-byte fermB_ds18b20[8] = {0x28,0xFF,0x64,0x0E,0x7F,0x57,0x09,0x66};
+byte fermA_ds18b20[8] =  {0x28,0xFF,0x64,0x0E,0x7F,0x55,0x1C,0x55};
+byte fermB_ds18b20[8] =  {0x28,0xFF,0x64,0x0E,0x71,0x86,0xF1,0xB8};
 
 String chiller_state = "idle";
 int tank_setpoint = 28;