I use OFF deep woods to repel ticks on myself. As for tick killer, you might want to get a professional out to spray pesticides on the property that will kill them. I think one pesticide that is used is Permethrin.
Do you mean on your pet, in the yard, or on your body?
There are steps you can take to prevent them:
Eucalyptus oil is known as an effective tickkiller. Just combine 4 ounces of purified or distilled water to a small spray bottle along with 20 drops of eucalyptus essential oil. Shake before using and spray on skin, pant cuffs, and shoes.
Nantucket Spider Tick Repelling Spray is highly recommended. A natural solution for pets in vinegar spray 50/50 vinegar and water.
Here's a video that might help - https://cleanwaterstore.com/blog/how-to-troubleshoot-low-water-pressure-on-well-water-systems/
You might want to try this... https://justcallmehomegirl.com/tick-tubes/