Shocking your pool is a vital part of maintaining clean, healthy water. It involves adding a concentrated dose of a chemical to oxidize contaminants, kill algae, and break down chloramines. However, not all shocks are created equal. Pool owners often face the decision between traditional chlorine shock and non-chlorine shock. NINGBO INNO PHARMCHEM CO.,LTD. provides both types of shock treatments to meet diverse pool maintenance needs.

Chlorine Shock (e.g., Calcium Hypochlorite, Dichlor)

Chlorine shock, most commonly calcium hypochlorite (cal-hypo) or dichlor, works by significantly raising the free chlorine levels in your pool. This high concentration effectively sanitizes the water, killing bacteria, algae, and stubborn chloramines (combined chlorine). Chlorine shock is powerful and essential for treating issues like algae blooms, cloudy water, or after heavy use. Cal-hypo is a strong, unstabilized form that won't raise CYA levels, making it ideal for most situations, though it might slightly increase calcium hardness and pH. Dichlor, on the other hand, is stabilized and contains CYA, which can be beneficial for chlorine longevity but may lead to over-stabilization if used too frequently.

The main drawback of chlorine shock is that it renders the pool unswimmable until chlorine levels return to a safe range (typically 1-4 ppm), which can take 8-24 hours or longer. It's also best applied in the evening to prevent UV degradation of the shock.

Non-Chlorine Shock (e.g., Potassium Monopersulfate - MPS)

Non-chlorine shock, typically potassium monopersulfate (MPS), is an oxidizer that works differently from chlorine shock. It doesn't sanitize by killing bacteria directly but rather by oxidizing contaminants and breaking down chloramines. MPS is gentler on pool surfaces and bather skin and eyes. Its key advantage is that it doesn't significantly alter chlorine levels, allowing swimmers to re-enter the pool shortly after application (often within 15-20 minutes). It's also ideal for regular weekly maintenance, especially in saltwater pools or smaller pools where excessive chlorine can be an issue.

However, non-chlorine shock is not as potent as chlorine shock. It's effective for routine oxidation and keeping water fresh but is generally insufficient for tackling severe algae blooms or significant contamination events. It also won't raise CYA levels, which can be a benefit if you're concerned about over-stabilization.

When to Use Which:

  • Chlorine Shock: Use for significant problems like algae blooms, heavy contamination, opening the pool after winter, or after large parties. It's the go-to for thorough sanitization.
  • Non-Chlorine Shock: Use for regular weekly maintenance, to maintain water clarity, or when you need to swim soon after shocking. It's a great preventative measure and ideal for saltwater systems.

NINGBO INNO PHARMCHEM CO.,LTD. offers both high-quality chlorine shocks and effective non-chlorine shocks. Choosing the right shock depends on your pool's current condition and your maintenance goals. By understanding the differences, you can effectively manage your pool water, ensuring it remains clean, clear, and safe for swimming.