I want to place my wp25 on the oflow box which means the backside magnet would get submerged in the overflow box. I know almost all pumps except for vortechs can have the holding magnet submerged with no ill effects but I'm still leary about Jebao's products since its so new. So have any of you done this? If so, any issues such as rusty magnets etc? or all good and I'm just being paranoid.