Pond pH fluid - Sera Pond bio balance 550g/2.5kg For safe stabilisation of water parameters - Prevents pH level fluctuations: - For gentle and safe increase of carbonate hardness and total water hardness; - Increases and stabilises pH; - Safely prevents dangerous pH level fluctuations. Natural processes in the pond and heavy precipitation affect carbonate hardness and pH levels. This can cause drastic pH fluctuations which are dangerous for fish and plants. Sera pond bio balance gently increases both the carbonate hardness and the overall water hardness and thus stabilises the pH level for a long time. Sera pond bio balance ensures a balanced supply of minerals, reduces stress and provides optimal environmental conditions for fish and plants. Manufacturer.