Danner Manufacturing, Inc., Pondmaster 500 GPH Pump, 02525

Installed in my 300 gallon pond, running to a Vevor UV pond filter. It hasn't been turned off since I installed it, no issues. Much higher quality than my last solar pump. Seems very heavy duty for the application, flows water well, quiet. I have cleaned it once, but it didn't have much build-up.

This is a replacement for the same model that has been running continuously for almost twenty years. The old one had not failed, but was partially clogged. I thought I might need a new one before taking the old one apart. I noticed very few in line pumps being sold. When I found this on Amazon, I decided to buy a new one because of this and have the old one for backup. This pump can be used in line and submerged. I went through three other brands that failed before buying this.

The year was 2014. The project was to restore an unkept pond at the new house. I had the time but not a lot of money. I had to redo everything with the pond stone, by stone, new liner, and of course a new pump. I did a bit of research and decided to go with this one. This pond also ended up becoming the sump tank for my aquaponics system. At first, I used 2 separate pumps, one for the waterfall and the other for the system. After the smaller, cheaper pump failed, I redid the piping to just use this pump for both. I have had a few half-dry runs when the pump has drained the pond due to an issue with the piping, ( poor fish, didn't know what was going on). The pond and system have frozen a few times. But the pump has never let up or failed. SO 8 years later and the pump is still moving plenty of water throughout the pond.

still working great. I have gone thru about 5 different pumps and they seem to last a week or so. decided to go for a nicer one and it is doing awrsome

Pump is awesome. I have used danner pumps with my salt water aquariums and am currently using the latest pump for my aquaponic system. The pump is quiet and energy efficient

I use this pump on my boat to provide cooling water to the condenser on my air conditioner. A traditional marine pump with equal flow/head would be about $200. Considering this pump only needs to run 100 hours per year, I figured it should last forever. So far (one hot summer) it still works great. I do not run this submerged. I use hose fittings on the suction and discharge. The only concern is plastic construction as opposed to reinforced fiberglass or metal. For pond use...no problem. For boat use, I never leave the boat unattended with this pump running and the seacock (intake valve) open.

Danner/Pondmaster make the best magnetic drive pumps - period. I want to say something more than "it just works" - Which really doesn't say much. This I can say from both an experiential and engineering viewpoint. I have over 45 years experience with aquariums, 10 years experience with a medium (>3000g) outdoor pond, and many outdoor water features. I have used Pondmaster and Danner mag-drive pumps for these applications, along with a few regrettable choices. As far as from a construction standpoint, these are a well made pond 'feature' pump or statuary/waterfall pump expected to run 24x7x365. To say I have 'abused' these pumps is an understatement: I have run one or more of these dry, in freezing ponds and fountains (although with pond warmers), and salt-water aquariums - No problems. Even with this type of treatment these pumps have ran for an average of 2.5 years without problems. Initially these pumps had problems with wear in the cover/stem area - this has been redesigned and reinforced for longer life. I recently replaced a Danner 500gph pump in my backyard fountain, which was retired from pond duty after 3 years, sat on a shelf for a year, and ran another two years. The cause of the failure? ....a broken shaft. A bonus is that these are extremely easy to rebuild. I will rebuild this pump with another impeller assembly and cover, and I will have a reliable spare for when or whatever. HIGHLY RECOMMENDED Update 24 July 2018: Already rebuilt, tested, and re-boxed. :-)

Pump works great, just undersized for my use, my fault

if i was using pump submerged i wouldn't have noticed but i'm using it inline and it leaks from what i discovered was a crack in the impeller housing.