About this item

• Fresh PSB (Photo Synthetic Bacteria) are able to digest large amounts of organic matter, ensuring superior water quality.
• Fresh PSB is freshly produced in the Netherlands, 100% natural, without dyes.
• PSB bacteria work without oxygen and can therefore also be added in higher doses for accelerated results.
• Bactoplus PSB — the award‑winning solution trusted by thousands of koi enthusiasts and fishkeepers Nationwide