计算卡氢、双氯或液氯的精确震击剂用量。输入水量、当前余氯和 CYA，即可获得精准投药量。
Enter your pool volume, current free chlorine (FC), and current CYA level. The calculator computes the SLAM (Shock Level Algae Management) target FC as CYA × 0.4 — the chlorine level needed to kill algae when stabilizer is present.
Choose your shock product: calcium hypochlorite (cal-hypo 73%, most common), dichlor (56%, adds CYA), or liquid chlorine (12.5% NaOCl). Each delivers chlorine differently and is dosed accordingly in oz, lbs, grams, or mL.
Always shock in the evening. Pre-dissolve granular shock in a bucket of water. Wait until FC drops to 1–4 ppm before swimming — typically 8–24 hours. Retest chlorine and CYA after the pool has fully circulated.
液体氯是最干净的选择，因为它不会增加额外的矿物质。如果钙含量较低，Cal-Hypo（次氯酸钙）很好。二氯异氰尿酸方便但会增加大量稳定剂（CYA）。
对于轻度藻类，通常需要达到10-12 ppm。对于严重的黑藻或黄藻，根据当前CYA水平，您可能需要达到20-25 ppm。
会，大多数冲击剂会暂时提高pH值。最好在重度冲击处理24小时后重新测试并平衡pH值。