Laguna PowerFlo External Biological Pond Filter, 1000-Gallon, 20-Inch

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Price: $116.88 $102.59   

Product Feature

• External biological pond filter
• Ideal for ponds up to 4500 liters
• 3 stage filtering system
• This product weighs 16-pound
• Filter measures 20-inch length by 13-inch-high, 15-inch width

Product Description

This powerflo external biological filter features an efficient 3-tiered filtering system that provides complete mechanical and biological filtration. The top tray houses pumice filter material (included) which provides mechanical and biological filtration. Below the top tray, a foam pad (also included) performs mechanical filtration. The bottom tray is designed to hold the biological media of your choice, such as Laguna biomax (not included). The trays have convenient handles which allow you to remove them easily. Other features include a built-in drain plug and 2 outlets for creating waterfalls or connecting to other pond equipment such as a UV sterilizer. The filter is designed to be installed outside the pond, which allows easy access for maintenance. A universal click-fit coupling for 3/4-inch, 1-inch and 1-1/4-inch inlet tubing is also included. This filter is ideal for ponds up to 4500 L (1000 US gallons.). Filter measures 20-inch length by 13-inch-high, 15-inch width. This product weighs 16-pound.

Laguna PowerFlo External Biological Pond Filter, 1000-Gallon, 20-Inch Review

We bought this as a second biological filter for our koi pond. The media inside our waterfall is our original (and primary) bio filter. However, the small koi that we stocked the pond with years ago have now grown to about 2 feet long. They eat a ton and "pollute" the water like crazy so we decided to add a bit more mechanical and biological filtration. We bought a second pump (Laguna MaxFlo 3000GPH) along with this Laguna bio filter. This new pump is in bottom of deepest part of pond (3.5') and circulates water through separate above-ground UV sterilizer and then to this Laguna bio filter which then empties back into pond. As another viewer noted, it was a hassle to find hosing that would fit the output connections of this filter. Seems to be an odd or irregular size. Regular pond hosing didn't fit so had to spend a lot of time and MUCH more $$$ than should be necessary to get hose that would fit and survive the elements.

As far as the actual performance of this bio filter...I have to say I'm unimpressed. The cost of it is low compared to others that I considered which is why I gave it a 2 instead of a 1.

What I like?
- The price
- Easy enough to clean. Bottom plug removes in order to drain. Lift-out compartments can be quickly hosed off.
Some other bio filters are set up for easy flushing and cleaning, but cost considerably more.

What I don't like?
- It's sort of flimsy (we laid some flat concrete pads behind the landscaping in order to level filter box and give it some stability)
- I don't like the filtering media provided (it keeps disappearing through the output hoses). Will replace with better option.
- Lid doesn't fit snugly enough.
- If you aren't careful in making sure that the two output flows are removing water from the filter at a rate equal to (or greater than) water coming in, the excess water will just spill out from under lid...and drain your pond.
- The already mentioned problem with finding output hosing to fit. I ended up having to spend $40 for 4.5' of output hosing.
- I feel that the engineering of the filter input/output and compartments is not optimal. If I don't clean it out at least once a week, too much dead algae and other gunk settles in the bottom. I generally only clean out our other biological filter (BioFalls) no more than 2-3 times a year. In order to keep the good bacteria operating at peak, the media needs water/oxygen circulating over it constantly. If water circulates too fast, the bacteria doesn't have enough time to do its stuff. But in the case of this bio filter, it appears to me that there is too much lower area in the box where the water doesn't circulate or move the water. As a result, the dead algae (from the UV sterilizer) and other small debris just settles in the bottom and slowly decays.

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