FROG - Maintain This pre-filled packet provides an effective and easy way to shock a hot tub without using chlorine. FROG Maintain® eliminates organic contaminants to keep water crystal clear and keep pH stable. Its single dose convenience makes regular shocking no mess, no guess and no stress. Formulated to keep pH stable. Best of all, you can use the hot tub within 15 minutes of shocking with FROG Maintain. Ingredients: Potassium monopersulfate 38.25% Sodium carbonate 15.00% Constituents ineffective as adjuvants 46.75%