They're monitoring it in a seperate, albeit smaller, container and it seems to be having a hard time heating the container more than 5*F above room temperature - it's currently 68* in a room that's around 65*F (NOT the same room the fish is in). lol I think Dad's starting to realize that it's not the best heater out there, and even if it was working I wouldn't be making any plans to return the heater coming in the mail just because I wouldn't trust it.
Shellica - Thanks - I suspect that once he sees that it's not holding a stable temperature that he'll come around. It's a bit difficult to argue the benefits of using it if the thing doesn't even do what it's supposed to.
Zubin - Heck, I'm not even wanting to be manipulative... I just would appreciate it if he'd realize that a heater that has been hanging up in the basement for nearly ten years may not be the most effective or safe way to heat a tank and that it has the potential to do some real damage to the house. He's mostly been really supportive of my fish obsession, but sometimes his idea of what's practical differs from mine.
Tikibirds - Oh, I fully believe that an older heater can be useful! It's just that I know little to nothing about it. I'm nearly certain that it isn't a Tetra heater - it's a tiny, solid grey plastic thing - but I think it operates around the same lines in that it isn't adjustable.
Lillie - Thanks, that's what we're doing
So far, it doesn't seem to be doing that great so it looks like it won't go into the tank.