In The Swim Algaecide 50 for Swimming Pools - Green, Black, and Yellow Algae Treatment for Above Ground or Inground Swimming Pools - 1 Quart - 2 Pack

Powerful non-metallic algaecide eliminates all algae types: black, green, and mustard.Low-foam, Quaternary Ammonium formula is stain-free and residue-free for easy pool maintenance.Ideal for weekly pool care, it's user-friendly for both in-ground and above-ground pools.Maintains swimmer safety after application.Do not mix with other chemicals, wait 6-8 hours after adding before swimming