Waterlife 7.2 Buffer adjusts and stabilises pH to 7.2, creating ideal conditions for most community tropical fish and plants that prefer a neutral pH. Creates ideal conditions for most community tropical fish and plants that prefer a neutral pH. - Will increase the pH to 7.2 in low pH aquariums, and decrease pH to 7.2 in high pH aquariums. - Increases the buffering capacity of the water to stabilise the pH. - 7.2 Buffer is a true buffer, i.e. once the correct amount is added, pH 7.2 stability will be achieved. - This product will not lower the pH below 7.1 or raise it above 7.3 180g Tub.