Sorry this happened man. I'm a bit away in Castro Valley but can give you quite a bit of frags if you can make the drive over once you get the tank going again. Definitely look into a more secure probe holder that you could either replace the suction cup with or use along with the suction cup. Something 3d printed to hang on the side of the tank or sump that will extend down a good depth into the water with a hole for the probe and then even gluing the wire or zip tying it to the extension on the way down is just what I could come up with off the top of my head.