a friend of mine has a turtle (i wana say its a red ear slider) in a 20 gallon. well her room gets pretty cold at night saying as how its in the basement (she checked the water temp last night and it was 60) but she cant afford a heater at the moment. since im her "aquarium obsessed friend" she asked me first if i have a spare heater laying around. i have one i bought for a tank im yet to set up so i told her she could use that until i need it back. well after thinking about it later i dont think i would want it back cause i wouldnt want to risk transfering salmonela to my house. so i thought i would just buy her one like mine and she could pay me back as she gets the money. its a marienland visi- Therm stealth 100. i know the bottom is protected with its shaterproof casing but what about the temp select dial? what im worried about is the turtle chewing on that or even the cord itself. should this be safe in a turtle tank or should i get (or tell her to get) a different one? i thought about telling her to get one that could be put inside her filter but im not sure what kind she uses. ill have to ask her and get back with yall on that one. what do yall suggest?