Your journey to a better aquarium begins today 4g (4000mg) 99.9% Expiration 05/31/2025 FOR AQUARIUM USE ONLY! NOT FOR HUMAN USE! Fish Flux is a reliable way to eradicate Bryopsis, Green Hair Algae (GHA), Turf Algae, Bubble Algae and more. Bryopsis is usually gone within 2 weeks other algaes may take 4-6 weeks. Fish Flux has shown to be safe for use with: Fish, Invertebrates and Corals ? Expiration Date: 05/31/2021 Directions: 1. Remove all activated carbon from aquarium. 2. Do a routine 20-30% water change of the tank. 3. Measure 20mg per gallon to be treated (4000mg treats 200 gallons). 4. Dissolve dosage in 1 cup of aquarium water and add to tank. (May not completely dissolve - this is fine) 5. If a water change is needed, 20mg should be added per gallon of replacement water. Warning: This should only be used for the purposes listed here. All responsibility of usage lies with the purchaser. We ship out daily via USPS. Shipping Information All orders are shipped within 24 hours M-F. If you order later in the day on Friday or on Saturday or Sunday, your order will ship early Monday morning. Return Information If you are not 100% satisfied with your purchase, you can return the product and get a full refund or exchange the product for another one. You can return a product for up to 30 days from the date you purchased it. Any product you return must be in the same condition you received it and in the original packaging. On Mar-22-18 at 15:05:49 PDT, seller added the following information: