Ето ако някой иска да си прави вкъщи, тук има модели за подражание: :-)
(https://aquariumbg.com/forum/proxy.php?request=http%3A%2F%2Fwww.solar-components.com%2F1000gpm.jpg&hash=db3135de8c414e19f1bdb84e8a612325cb373ae4)
(https://aquariumbg.com/forum/proxy.php?request=http%3A%2F%2Fwww.solar-components.com%2FINDPROT.JPG&hash=c47bb314c3e8796bc98a1c67c360a40e30f436e9)
Източника: http://www.solar-components.com/protskim.HTM