For stabilizing water parameters safely - prevents pH value variations For the gentle and safe increase of carbonate and total hardness Raises and stabilizes the pH value Reliably prevents dangerous pH value variations Natural processes in ponds and heavy rainfalls influence the carbonate hardness and the pH value. This may lead to life-threatening pH value variations. sera pond bio balance increases the carbonate hardness as well as the total hardness in a natural, gentle way and thus stabilizes the pH value for a long time. sera pond bio balance ensures a balanced mineral supply, stress reduction and optimal environmental conditions for fish and plants.