Not sure where this belongs but here it goes I have a 75 watt Eheim Jager heater in my Multi tank and now the little buggers have decided it doesn't fit in to their landscaping design so they have decided to bury it.I had it laying horizontal in the back of the tank for months but now they covered in play sand so I moved it to a back corner and hung it vertically and now they have managed to bury it again about half way up the heating coils,will this kill the heater?Never a dull moment in this tank,amazing how much sand they can move in a day.