A buffer regulates the water quality within your pond. It works to stabilise the calcium, carbonate and therefore the pH levels and keep the processes that occur to keep the pond healthy in good order.
A rise or drop in the pH level can cause fish stress and ultimately infection or disease. So it's vital to keep these levels stable with the addition of a good buffer treatment. We carry a wide range of products from top brands such as Oase and Tetra, so you can be sure that your pond is in the best hands.
Remember that rainwater, other treatments and plants can all affect the pH of your pond, so test regularly and treat with the appropriate buffer.