How do I get the caps off of U52000 Deep Cycle 6 volt batteries to put water in them?

Thanks everyone. I know to use only distilled water. We just can't pop the tops off

clydie, they can be a little stiff. just pop it off. only distilled water

Or distilled water

I would suggest Google it. My mom had the same question. She is not answering her phone. She Used spring water.