Check the listing for details. Green Aid 4 lb. Condition: New. Listed at 44.99 USD. Amazing Green Algae Cleanup Results Green Aid is a chemical breakthrough! Amazing cleanup results when used prior to shock treatment with an EPA-Registered chlorinating compound that kills green or mustard algae. Typical results occur in 24 hours Works great with higher pH (7.8+) Not affected by high levels of cyanuric acid Works well with salt chlorine generators NO metals added with this product Can be used with all pool surfaces INSTRUCTIONS Initial Application CAUTION!​ (a) NEVER​ pre-mix GREEN AID with chlorine (b) NEVER​ add GREEN AID to a bucket or pail (c) NEVER​ vacuum pool immediately after application (d) NEVER​ add to skimmer basket or filter suction line! Very strong reaction with chlorine can occur if not mixed in pool. Circulate pool water through filter and, for best results, brush pool well before beginning. SHAKE WELL TO BREAK UP THE LUMPS​ (product lumping in transit is normal). Adjust chemical balance to: pH > 7.8, alkalinity 80 -120 ppm, cyanuric acid 25 - 75 ppm and chlorine level 2 - 2.5 ppm. ADD DIRECTLY TO POOL 2 POUNDS GREEN AID per 15,000 gallons water. Spread half of it along the perimeter of the pool, starting where the algae are the thickest. Concentrate the rest directly over the problem areas. Never add more than is recommended. WAIT 5 MINUTES, THEN ADD DIRECTLY TO POOL 2 pounds powdered chlorine (or equal)​ per 15,000 gallons water. CIRCULATE POOL WATER​ with filtration continuously for 24 hours using only the main drain if possible. Repeat step 4, adding additional chlorine after 12 and 24 hours. Return equipment and chemical balance to normal after clean up. SHIPPING: We will do our best to ship your order based on the shipping method selected, however in some cases, your shipping method may need to be modified to meet shipping requirements based on the carrier. Our current carriers used are UPS, FedEx and USPS. Please contact us directly through the "Contact Seller" link if you need UPS, FedEx or USPS specifically for your order.