• Laguna PT255 Skim Away Skimmer Filter Fountain, for Ponds Up to 1890-Liter (500 U.S. Gallons)
Laguna SkimAway skimmer filter fountain is a new and unique multifunctional skimmer filter fountain for water gardens combining functionality and visual elegance. Designed for small ponds up to 500 U.S.gallon. SkimAway skims filters creates a beautiful geyser fountain display all in one compact, lightweight and easy-to-maintain unit. SkimAway comes complete with a pre-installed 757 LPH water pump, filter foam media and a leaf/debris collection basket, all combining to provide complete filtration for clear and healthy water. All you have to do is place the unit in the water at the appropriate height and plug it in. The unit has 4 adjustable feet, each allowing independent height adjustment up to 2-inch. The adjustments can be made at the top of the unit, above the water line, so you don't have to reach in the water and get your hands wet. The unit also has a floating skimmer door with a built-in fish guard that automatically adjusts to the water level and a separate chamber for adding gravel or additional filter media such as Laguna Phos-X. In addition to its practical operating functions, SkimAway has many aesthetic features that will add a touch of inspiring beauty to your pond setting, including a natural-looking faux wood finish, a plant basket for adorning the unit with aquatic flora, LED accent lighting at the top and near the bottom of the base, and a geyser-style fountain outlet that produces a thin, sheet-like waterfall over all four edges. The unit has a removable lid that provides easy access to the pump and filter media for trouble-free maintenance. It includes 757 LPH pump, 10 super bright LED lights, fine/coarse filter foam media 4, aquatic planting basket, debris basket. This product weight is 11-1/2-pound. Measures 9-1/2-inch length by 9-1/2-inch width by 13-2/7-inch height.
  • Reversible argyle raincoat
  • Designed for small ponds up to 500 US--Gallon
  • SkimAway skims filters creates a beautiful geyser fountain display all in one compact, lightweight and easy-to-maintain unit
  • This product weight is 11-1/2-pound
  • Measures 9-1/2-inch length by 9-1/2-inch width by 13-2/7-inch high

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Laguna PT255 Skim Away Skimmer Filter Fountain, for Ponds Up to 1890-Liter (500 U.S. Gallons)

  • Brand: Laguna
  • Product Code: PT255
  • Availability: 20
  • $179.19

Dynamic Head

The effect of the Earths gravity on the "lift" or head pressure is fairly simple; for every vertical foot of distance the pump moves the water you are adding one foot of head pressure so the ratio is a 1:1 ratio. The effects of the friction, caused by water as it travels through your hose or pipes, on the total head pressure is a little more difficult to calculate especially as there are slight variations in pipe friction in different hose materials and the smoothness of the inner bore. Basically. for every ten feet of pipe through which the water has to travel travel horizontally will contribute 1 foot of head height; the ratio of the pipe friction loss is a 10:1 ratio.

Plumbing fixtures and bends and corners in your hose also increase the total head you must calculate to ensure the proper final volume from your pump. Every corner with a 90 degree elbow in your plumbing will add 1 foot of head pressure  with a 1:1 ratio. 45 degree elbows, tees and even insert couplers can all have an impact on the final flow.

If you install a pump 40 feet away from the top of your waterfall which is 6 feet above the pump and the tubing is a single run of 40 feet horizontally then you add 4 feet of head for the tubing length (the 10:1 ratio) to the 6 foot differnetial between the pump location and the final height of the waterfall so your final total dynamic head calculation would be 10 feet. This means your final volume of water flow in this water feature or application would be the volume of flow on the performance curve that equaled the gallons per hour at 16 feet. This volume will certainly be much less than the initial volume the pump can move at an open flow or a zero head.

If in the above example your 40 feet of horizontal tubing run also required 3 elbows of 90 degrees then an additional 3 feet of theoretical head would be added and your final flow result would be at 19 feet on the performance curve of the pump. In this example you would want to choose a pump that has the desired GPH rating at 9 feet of head pressure.  Tubing size is also an important factor in accounting for head pressure loss, in general you should never reduce the diameter of the tubing below what the output size of the pump is, this will drastically increase head pressure, and reduce pump performance.  For maximum pump performance, using the largest tubing that is practical is the best choice. A best practice is to use a hose with an inner diameter that is the same as your pumps outlet fitting.

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