Getting the correct amount of oxygen into your pond water is essential for fish, pond plants & the microbes that help keep your pond clear & free from algae. The floating solar oxygenator is an ingenious air pump suitable for small to medium sized ponds. Solar-powered, the brighter the sun, the more oxygen it will pump into the water through its air-stone attached to the end of a 54cm (21¼in) plastic tube. It's so simple, just float it on your pond, there's no wiring required & as it moves it oxygenates different areas of the pond. Unlike static oxygenators, you don't have to worry about where to position it & importantly, there are no running costs either. Measures 27cm dia. (10½in).