If glass is found in a pool, what must be done?

The presence of glass in a pool poses a significant safety hazard. It is essential to prioritize the safety of all pool users, as glass can lead to serious injuries, including cuts or lacerations. The proper course of action is to drain and clean the pool to ensure that all shards of glass are completely removed. This not only protects swimmers but also helps maintain the overall cleanliness and integrity of the pool environment.

The other options are inadequate responses to this situation. Leaving the glass to filter out could still allow small shards to remain in the water, increasing the risk of injury. Covering the area with a net might not effectively contain the glass and could provide a false sense of security. Lastly, ignoring minor glass pieces would certainly be unwise, as even small fragments can cause harm. Hence, draining and cleaning the pool is the most reliable method for addressing the issue.