Here’s what to use instead. ' title='Things to Never Put in Your Pool, Acc to Expert Tout'> Leslie's Pool Supplies In the three years since I moved into this house, just about everything that could go wrong with our pool has. We’ve had to replace the liner, hire an exterminator to assess termite damage, deal with algae overgrowth, and even had to shell out $1,400 for a new pool cleaner....