Lead for many Jahern with such pumps (also from other manufacturers) to my little fishpond fresh air and keep it in the winter time a little above freezing. The Pontec is no worse than the other models I've tried. I find it just too loud because the droning hum can be heard several meters clear. Since I already had quieter models. For the Pontec 36973 PondoAir pump 200 but with Supplement from August 2014: After just 8 months the part is broken. Can happen, but it should not. Conclusion: You prefer not buy Pontec-cheap goods.
