I recently moved to a house with a small pond with fish (I know nothing about either). The pump was working fine, but now doesn't seem to be, though it is trying to work - the motor (?) sounds OK it's just not getting any water through. I'm worried that without the pump getting oxygen in to the water the fish will die. What could be wrong with the pump? (Oh - it's a submerged pump). Not only do I not know anything about pumps but I have no idea how its been installed so therefore, no idea what to look for or where to look. Any / all help most appreciated. Many thanks, Liz.
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Sorry to hear of your setback but hopefully we can get you back to worrying about your pond occupants rather than the equipment. First remove the filter cover and filter and give the impeller a gentle turn to feel if the bearing or motor is jammed. If it turns freely try powering the unit to check if the impeller turns, sometimes the impeller needs a little bump to get it moving at first. If nothing still happens return the pump for a replacement.
Find your main suction line and be sure it is clear. Also be sure their is no false rocks or sumps to hide the pump. When you get to the pump if it is under water make sure it is clear and not air locked. If under the pond be sure it is clear of dirt and you will need to take apart to check the impeller. Before you do these things check all power in and out of switches or clocks and be sure the motor is running. If it is a submersible pump you will probably change the whole thing if the motor is out. If it is outside the pond just the motor and seals should do the job. Good luck.
After checking the power supply to the pump, we found a short and have temporarily fixed the problem by plugging the pump into the house! I will need to buy a new electrical outlet. Just glad it wasn't the pump. That would have been difficult to get out of the skimmer to replace it! I am planning to drain the pond in a couple weeks and hope to be able to clean the pump then. My fish are happy now!
Clarke is a UK line of garden pumps. I advise visiting the following website where once you a photo of a similiar style pump they offer a downloadable manual:http://www.machinemart.co.uk/shop/categories/search/miscellaneous-pumps
I live near Memphis TN so don't have that pesky "frozen water" problem. However, I do aerate my 2,500 gal goldfish pond with a Oase Biosys Skimmer (free standing/ floating skimmer) which is powered by a Laguna fountain pump. I attached a small pipe on the discharge end of the pump & set the pump so that this pipe is a few inches below the water's surface. The discharge provides a small fountain effect that keeps the surface moving while aerating the water. The skimmer keeps the leaves / debris off the top of the water the pump keeps the water moving...and moving water will not freeze. Hope this helps
Utility Pumps: Utility pumps draw water through openings that screen out debris. When placing one into a pond, use a pump sock or other enclosure to reduce the amount of cleaning needed. If you use a pump sock, be aware that sock-like screening can cause a dry pump situation.
Solids Pumps: These pumps draw water through a large opening and pump small debris through without clogging. For this reason, they can be placed into a pond without prefilters. Note, however, that this type is not safe for ponds with fish, frogs or other aquatic animals