Posted: Wed Dec 13, 2006 8:14 pm
What wattage did you get for the 10-gallon tank? It's generally recommended to allow 5 watts per gallon of water, so a full 10-gallon tank would really need only a 50-watt heater. If you got one with a higher wattage, though, you'll be able to use it when you upgrade the tank.
I have to ask---did you put your hand on it when it was submerged in the water? (If you didn't you risk having it explode.) In the water, it really shouldn't feel that hot. The heat quickly dissipates into the water. If you're really concerned, you could make (out of PVC pipe--drill enough holes so the water can circulate freely) or buy a heater guard (Fluval/Tronic makes them). Can you adjust the temp? At a temp of 78F, the heat shouldn't be that warm in the water.
I use heater guards in some of my tanks, but it's more to protect the heaters that are glass from being hit by rocks when my turts move rocks around. And, I use a guard with a high wattage heater (like 400 watts) that's in a stock tank as insurance that the stock tank won't melt if there's a malfunction. But I've also got a glass tank with a heater that has no guard, and the turtle in it has never gotten burned, even when he's stood on it.
Remember, it's good, when you first put the heater in the tank to let it sit for about 15 minutes to allow it to acclimate to the water temp before turning it on. Likewise, when you unplug it to clean, let it sit for about 15 minutes after unplugging before you actually take it out of the tank.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-