Bavaria panel 201 - how to fix the blinking tank sensor

On the panel 201 there is two red LEDs located at the switch nr. 14, the two red LEDs is named T1 and T2 wich stands for holding tank nr. 1 and holding tank nr. 2. The switch is for the scredder pump from the toilet to the holding tank so you get a thin flowing stream of shit to the tank. On my boat I only have one manual toilet so the scredder pump is not pressent. I also only have one holding tank so my system only use the T1 LED at the panel. In this video I show how to test the system and how to fix a fault in the sensor in the holding tank. In this video I don't let out any waste into the ocean. My holding tank has been empty all the years I have owned the boat and in this video I only use clean water to demonstrate the function of the system. In this video I used West System Epoxy and a Dremel Tool The holding tank sensor is of the brand Calira and you can buy one new here : https://www.jasicamp.nl/staafsonde-m400-schaudt-schoonvuilwatertank-nr85501/p669