This is a mechanical water leveler that fits in the left side of the full size Savio Skimmer to maintain a consistant water level. This assembly connects to a 1/4" (quarter inch) water line and fits easily into the UV chamber of a full size skimmer. Obviusly this can not be used where both sides of the skimmer already house a UV light. It can however be used with one UV light. There is also a mechanical leveler avialable to fit the right side of the skimmer. Savio makes a much more expensive digital water level controller - this is not it.
All orders over $99 ship for free - however if this item is ordered alone, it will ship for free even though you do not have a $99 order!
To determine the left or right side of the skimmer you would stand on the ground behind the installed skimmer, looking over the top of it into the pond.