Waterlife 6.5 Buffer lowers pH and hardness of tap-water for acid loving fish and plants. Waterlife 6.5 Buffer softens and acidifies tap-water for acidophilic fishes and plants. Once the right amount of 6.5 Buffer has been added a pH of 6.5 will be achieved and maintained. This mechanism makes 6.5 Buffer a safe method of adjusting pH. - Creates ideal water conditions for acid- loving fishes and plants. - Softens the calcium carbonate/bicarbonate conditions to zero. - When used in conjunction with Tropiflora (plant fertilizer) it makes a perfect combination for vigorous plant growth as well. - Reduces fish waste toxicity. - Reduces harmful bacteria. 180g Tub.