Q.Aloe Vera tips dying
I have several sized Aloe Veras. I have noticed the tips on a few of them are wilting. They get light from a plant LED and the room temperature is roughly 20 degrees through winter. They are in a cactus potting soil. I water maybe once a month. What do I need to do to save them?

Though there are some varieties of Aloe Vera that can tolerate cold temperatures most will not thrive or survive in the cold.
The lowest temperatures that most Aloe Vera will tolerate is 40 degrees F.
I would move your plant to an indoor warm location.
Here are some links to refresh you n the care requirements.
Under watering will also cause the tips to turn brown and this will travel down the stem.
https://www.gardeningknowhow.com/houseplants/aloe-vera/aloe-vera-plant-care.htm
https://www.gardeningknowhow.com/houseplants/aloe-vera/growing-aloe-outdoors.htm