If the chlorine levels in your pool are already high, it is generally not necessary to shock the pool. Shocking is typically done to raise chlorine levels quickly when they are too low to effectively sanitize the water or address a specific issue such as algae growth or cloudy water.
If your chlorine levels are already high, it's advisable to let them naturally decrease over time through regular water circulation and exposure to sunlight. You can also partially drain and refill the pool with fresh water to dilute the chlorine concentration if it is excessively high.
However, it's important to note that the ideal chlorine level for a swimming pool depends on various factors such as pool type, usage, and environmental conditions. It's recommended to regularly test the water using a reliable pool testing kit to ensure the chlorine levels are within the appropriate range for safe and sanitary swimming conditions. If you're unsure about how to maintain proper pool chemistry, consulting a pool professional or a local pool store can provide you with tailored advice for your specific situation.