i got one for my partly-blind HMPK, Theo, when i got his 2.5 gallon replacement tank(the 2.5 gallon KK i bought for him was cracked at the bottom. >.>). i was gonna use it, to train him to eat his pellets off it, since he wasn't able to see the pellets till they sunk to the bottom, then didn't recognize them as food till they sunk into the rocks. after getting it out, and looking at it, i noticed the wire inside it was visible! i took a pair of needle-nose pliers and ripped it out. now, it's just silly-looking. >.> all droopy. i'm thinking about "ghetto-rigging" it, so it sticks out straight and sturdy, with maybe some plastic and silicone.