Tetra Pond Bio-Active Pressure Filters with UV Clarifier

I installed this filter 3 weeks ago. So far it is working great. It has my pond water crystal clear and has removed all algae,dirt and odors. I especially like the fact that I have'nt needed to change any foam filters since it does'nt have any. I also bought the Tetra DHP3600 pump which was recommended for the back flush to work properly. It also increased the water flow to my waterfalls.

I have had a pond for 9 years and was getting tired of constantly cleaning the foam filter. I almost decided to get rid of the pond but the way this product has eliminated the maintenance, I decided to keep it.

We have a kidney bean shaped 1000 gallon outdoor pond that was getting very difficult to maintain. We have plenty of oxygenating plants (a few lily pads, parrot's feather, aquatic mint) which was keeping a lot of the algae at bay but the water was always cloudy and difficult to see into. A friend purchased the larger version and sold me on it, so we figured we'd give it a shot.

Installing the filter is easy: connect your pump to the filter inlet with tubing and then more tubing from the outlet to where you want it to flow... in our case, the top of our waterfall. Make sure to purchase some Teflon Tape to wrap the inlet and outlet adapters and a few Hose Clamps based on the size of your tubing for a waterproof seal. We plugged it in (the UV light needs electricity) and waited a few days. The instructions say it takes up to 3 weeks to start seeing the effects.

In our case, the water cleared up in 2 days! Literally, crystal clear water. Now keep in mind, this filter does not remove all the algae in the pond, the UV light sterilizes the algae so it cannot reproduce. It makes it a lot easier to maintain though and does not disappoint. There is a convenient knob on the top of the unit to backflush the unit if it gets clogged. Simply turn the knob from one direction to the other and it will backflush all of the dirt and debris from the filter out of the unit. Turn the knob back on to resume normal flow.

All in all, we are very satisfied, the price is a bit steep but definitely the cheapest around and completely worth it in the long run. One more thing to keep in mind, whenever you use a pressure filter in a pond system, expect a normal loss of anywhere from 25-45% in water flow. Make sure you have a pump that is between 3000 and 4500 gallons per hour and it should work just fine for you and you won't have too much of a noticeable loss.

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This filter is wonderful. I previously had a jebo filter that was cheap and got the job done for about a year, but when it comes to ponds the saying,"You get what you pay for," is very true. I love the backwash feature on this tetra filter, so much better than the jebo! Although I wish the outlet for the backwash was a standard garden hose size for more convenient watering of my garden plants, but is an easy fix. The construction is very sturdy, if it needs parts to be replaced they are easy to find online. Putting the filter media in initially is a little tricky, but worth it because I'll never have to do that again. no more hosing off the filter sponges, yay!

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After getting a recommendation from my local pond store I purchased the Tetra Pond Bio-Active Pressure Filter and it is such a treat to NOT have to wash out the sponges from my previous filter. It took about 3 weeks but my pond is clear!!!!

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I've been using this filter for a couple of years, and overall I'm very happy with it. One point to note, however: It's possible for the filter to be overwhelmed by too much string algae. If this happens, back flushing just doesn't work. If back flushing doesn't seem to work for you (or only works for a day or less) and you open up the filter canister and see that it's filled with a thick "pudding" of green algae with the filter pellets embedded in that pudding, then you've got a problem.

But not an insoluble one. After some experimentation I came up with a good way to clean the filter media -a method that's vastly better than trying to clean each pellet off with your fingers:

1. Get a five-gallon bucket and drill a lot of holes in the bottom. These holes should be about 5/16" in size -too small for the filter pellets to fit through or get jammed in. Drill as many holes as you can without them overlapping.

2. Scoop several handfuls of the algae-and-filter-pellet goop out of your filter and into the bucket.

3. Using a garden hose with the nozzle set to a tightly-focused spray, work the spray back and forth over the goop in your bucket, holding the bucket at an angle with just the edge resting on the ground (this allows the water to run through the holes in the bottom of the bucket easily). Gradually (assuming you have good water pressure) the algae will be blasted away from the pellets and flushed out through the bottom of the bucket.

4. Take the cleaned pellets out of the bucket and set aside. Repeat the process with more batches of goop from the filter, but note that you don't want all the pellets to be completely algae-free; you need some algae in there for the filter to work.

5. I spoke to the people at Tetra Pond, and they recommended a product like Phosphate Minus to cut down on the amount of string algae growing in my pond, and to hopefully keep this from happening again.

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