Which garden owner hasnt had that problem on hot days the climate in your pond is uncomfortable for your fish the solar pipe ventilator air s will relieve your problem this product is really easy to use it is powered by a 15 w solar cell which makes it independent from other power supplies and safe due to the low voltage max air ammount 120 lh powerful 15 w crystaline solar module long lasting hard wearing air pump comes with 2 m pipe and fizzing stone you will receive a