MaddieLynn

I'm getting my sister a betta for her birthday, so I'll be taking my 2-15 gallon heater out of my mollie's 10 gallon and putting it in the betta's 5 gallon. I have another heater, but I have 2 questions about it:

#1: My grandmother brought me the heater with her 29 gallon tank, so will it be too powerful for a 10 gallon?

#2: It doesn't have setting for certain temperatures, just a knob that you turn to make the temperature higher or lower, so how do I get it to the correct temperature without killing my fish by experimenting?

Lucy

1) How nice of your grandmomther. It depends on the watt of the heater.

2) Test it. I bought a used tank that came with 2 heaters. I filled an old 5g tank added a thermometer and played around with the heater. I recorded the temp and position of the knobs.

Does your sister know about the Betta or is it a surprise?

MaddieLynn

It's a surprise, but she has been asking for it. I got her one last year and she LOVED him, but unfortunately he died after a few months because she forgot to de-chlorinate the water.

If the heater heats 4 gallons to 78 degrees at a certain setting, will it heat 10 gallons to the same temperature on the same setting?

How do I find out the wattage? It wasn't in a box because she had used it before.

Lucy

I don't know, I'm sure it probably depends on the wattage.
You can try calling the manufacturer and ask how to tell how many watts it is.

Red1313

It sounds sort of like the one I got from tetra. you could just let it sit in the room temp tank with the dial set at about the midrange. after a 30 hour plug it in and keep an eye on it I think the thermosat kind of sets itself at that base range in the 1st half hour and moves from there. but I could be wrong.