Sunterra 337106 Prefilter Box for 500 Gallon Pond Capacity, Black Review

This filter box is a pre-filter that draws water through two foam pads -- a coarse filter, then a fine one -- before it is drawn into the pump.My Sunterra pump includes another filter inside a snap-on housing, so the pond has three filters in all.The box filter is effective but clogs quickly.The top is held on by four screws.To clean the foam pads, you must disassemble it. Awkward.Some kind of snap-on top would be more convenient.Also, my Sunterra pump has a threaded outlet which is designed to be used with a Sunterra diverter valve . . . more than I needed or wanted!(I have a small pond.)A trip to a hardware store yielded a few plastic plumbing coupling that allow me to snap a hose onto the outlet with a quick-release coupler . . . very convenient.
I had drained the pond and refilled it before installing the Sunterra kit.It wasn't possible to drain it entirely because of the fish, however.The filter got clogged quickly even with new, clear water -- well, clearER than it was!Yesterday I drained the pond again, more thoroughly, and decided not to use the box prefilter but just the pump with its built-in filter.I can get it out by snapping off the pump housing.If it doesn't clog for a week or so, I'll try to add the prefilter again.If it does clog, I'll just go with the built-in filter.

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Product Description:
A contained body of water is subject to conditions such as dirt, insects, algae and decomposed vegetation that affect the water clarity and health.A filtration system is needed to balance the ponds ecosystem.This filtration system must match both the power of the pump and the volume of the water garden.The Pre Filter Box is for use with 200 and 320 Gallon Per Hour Fountain Pumps to provide mechanical filtration for use in water accent applications.In Mechanical filtration, the water is pumped into the filter creating the necessary pressure to begin the mechanical filtration stage.There are two phases in the mechanical filtration stage, course and fine filtration.Each phase uses a specially designed foam filter to effectively remove all sizes of unwanted debris.The pre-filter cleans ponds up to 500 gallons and is recommended for use with Sunterra pump numbers 120016 and 137016.

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