Took the cover off a corner of the pool cover this spring to get to a temporarily repaired puncture in the liner from a falling branch last fall.  And within a day or two the pool started turning green.
Have the ladder up against the drain cover, seems sturdy enough mom.
Puncture is cleaned and dried.
A bit closer.  Patch is clear vinyl and uses the same cement as we've all (ok, my generation and before) to patch our bicycle tires.  The solvent that melts a bit of the surfaces together.  Never forget that smell of freshly patched bike tires.
All patched and ready to just add water!
 

 
 











