Perfect pH is a revolutionary pH stabilizer that automatically balances the pH of your hydroponic or growing system without the need for meters and acids. Perfect pH's advanced ionic technology eliminates unwanted pH fluctuations that limit plant growth. Using Perfect pH eliminates the need to add chemical buffers and acids, reducing frequent pH changes. The capsule is designed for 266 liter containers and keeps the pH stable for at least 2 months. Ideal for recirculating and non-recirculating systems.