Buffer Block – Eco-Friendly Pond pH & Hardness Stabilizer

UltraClear® Buffer Block is a natural solution designed to promote stable, healthy water chemistry in ponds. When alkalinity is low, ponds experience dangerous pH swings that stress fish and reduce biological balance. BufferBlock delivers essential calcium and alkalinity to smooth out these swings and support healthier living conditions. 

Beyond its buffering benefits, BufferBlock helps nourish the beneficial bacteria essential for clear, balanced water, and also contributes calcium for fish bone development. Simply place the block in a high-flow area like a skimmer, waterfall, or filter—no measuring needed. Each block treats up to 2,000 gallons and lasts about 3 weeks before dissolving and needing replacement. 

Safe, slow-release, and eco-friendly, UltraClear® BufferBlock is the easiest way to maintain clearer, cleaner, and more resilient pond ecosystems. 

• Stabilizes Pond pH Naturally: Helps reduce harmful pH swings in low-buffering ponds by gradually increasing alkalinity and hardness. 
• Supports Fish Health & Beneficial Bacteria: Releases essential calcium to support healthy fish bone growth and beneficial bacterial activity. 
• Long-Lasting, Maintenance-Free Care: One block treats up to 2,000 gallons, for up to 3 weeks—just place in high flow zones (skimmer, filter, waterfall) and replace when dissolved. 
• Eco-Safe & Gentle: 100% natural, chemical-free, and pet-safe. Safe for koi, goldfish, aquatic plants, pets, and wildlife when used as directed. 

UltraClear® Buffer Block is a natural solution designed to promote stable, healthy water chemistry in ponds. When alkalinity is low, ponds experience dangerous pH swings that stress fish and reduce biological balance. BufferBlock delivers essential calcium and alkalinity to smooth out these swings and support healthier living conditions. 

Beyond its buffering benefits, BufferBlock helps nourish the beneficial bacteria essential for clear, balanced water, and also contributes calcium for fish bone development. Simply place the block in a high-flow area like a skimmer, waterfall, or filter—no measuring needed. Each block treats up to 2,000 gallons and lasts about 3 weeks before dissolving and needing replacement. 

Safe, slow-release, and eco-friendly, UltraClear® BufferBlock is the easiest way to maintain clearer, cleaner, and more resilient pond ecosystems. 

• Stabilizes Pond pH Naturally: Helps reduce harmful pH swings in low-buffering ponds by gradually increasing alkalinity and hardness. 
• Supports Fish Health & Beneficial Bacteria: Releases essential calcium to support healthy fish bone growth and beneficial bacterial activity. 
• Long-Lasting, Maintenance-Free Care: One block treats up to 2,000 gallons, for up to 3 weeks—just place in high flow zones (skimmer, filter, waterfall) and replace when dissolved. 
• Eco-Safe & Gentle: 100% natural, chemical-free, and pet-safe. Safe for koi, goldfish, aquatic plants, pets, and wildlife when used as directed.