Can I patch a small tear in my pool liner myself?

Yes, a small tear above the waterline is a simple DIY fix. Get a vinyl liner patch kit from any pool supply store, clean the area with rubbing alcohol or acetone, cut the patch round with rounded corners, apply adhesive, press firmly, and wait 24 hours before filling. A proper kit costs less than $20 and takes ten minutes — don’t ignore it, because a small tear becomes a big tear fast.