Okey I just bought an new Eheim Jager heater and have some problems setting it up. There is hangover on the glass in my aquarrium so the suction cups can not fit unless I submerge the whole heater under the water. Like even over the wire. Can i do this with the heater, it does say fully submersible and waterproof but I am still not to sure. And is it safe to put my hands in well it is on, my pa keeps on telling me to switch it off when I do cause the instrucions on the back say I must. It will be an huge mission to switch it off an on constantly for me just putting my hands inside. No fish in there yet. Looking for water at 25 Degrees Celsius.(Not to sure how much that is in Ferinhite but guessing roughly around 87)