John B. Goode "JBG" says:

Weak sauce This pump is rated at 1000 gph for 500-1000 gallon ponds, but it’s more suitable for 500 gallon ponds as it’s rather weak. The pump is tiny, but it works well so far. If you have a pond that’s more than 500 gallons, get the next pump up which is the Tetra 1900 gph pump which is for ponds of 1000-1500 gallons.I like the fact this pump has a hose intake and Tetra sells a bunch of different pre-filters that are more or less modular. I’ve attached a skimmer and a pre-filter to this pump with a piece of T-tube coupling and am pretty pleased with the results so far. And gallon for gallon, this appears to be the best deal.Update: I had to go to the hardware store to find step up and down adapters because the filters and the pump had different size hoses but I’ve found that Laguna sells hose fittings and adapters that make connections between different sized hoses a snap. Just follow the links below:Pros:1) Price.2) Modular design. I’ve had a lot of fun adding different types of filters to it, in fact I’m having so much fun that I’m building my own larger filter for it.3) I’ve read on a forum that Tetra products has fantastic customer service. I hope I don’t have to use it myself but this pump has a 3 year warranty and that particular forumer said he got his pump replaced with a better one and even got extras thrown in. The fact that Tetra pond has an 800 number listed and people on the phone to help sounds great. Also, Tetra has been around for a long time, about 20 years that I know of.