New to racks.

[The Serpent Merchant]

I have two 15qt tubs and I have a heat pad under them also have a thermometer with probe in them but the temperature is tooo low how can I raise the temperature.

Welcome to the site.

To try to answer your question I need to ask you a few questions:

1. do you have a thermostat regulating your heating pad.
2. what type of thermometers do you have?
3. what are your current temperatures?
4. what is the temperature of the room the tubs are in?

In the future, it really is better to start a new thread rather than redirecting an old thread.