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Your cart is empty.Great ponds start with TetraPond® products! We have everything you need to set up and maintain a beautiful pond, including water pumps and filters, pond accessories and décor, lighting and equipment, and fish nutrition and water care products. TetraPond Replacement Pre-Filter Foam is a coarse foam cylinder designed to fit inside the Tetra® Pond Water Garden Pump Pre-Filter. TetraPond Pump Pre-Filter is designed to be attached to the intake of any Tetra® water garden pump to reduce clogging. Its unique design is easy to detach for cleaning. Replacing the filter foam is quick and simple—just detach the lid from the pre-filter, remove the old foam and put on the new, and reattach the lid to the unit. The black foam cylinder features a 1-inch diameter hole in the center, and measures 6 inches long by 4 inches diameter. Additional size available. Since 1951, Tetra has developed the world’s most comprehensive body of fish food knowledge, and fishkeeping enthusiasts have looked to the brand for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need – from a large variety of quality fish food and innovative equipment to test kits and decor.
Kimaps
2025-06-20 15:57:20
I have been using these filters for a few years now. The price is fantastic and they fit my filters. I have 3 different filters I change depending on the season. These fit all three of them. One issue I had was with an older filter pump that had a hole at the end of the filter pump intake tube. I used fishing line and threaded it through the filter cartridge closing the end, preventing the tadpoles from getting sucked in. The filters have changed since I bought them last year. The mesh in the filter has slightly larger holes now. It makes cleaning easier but does not pick up smaller particles like it used to. While this can be a problem at times, it works good in the fall with all of the falling leaves.
Andrea
2025-05-12 17:06:37
Keeps the pond clean, has great filtration, and is easy to clean the filter. Will purchase one again next year or later (made of quality material -- think it will last a few years). Good purchase at a good price!
Jen
2025-05-09 10:15:14
The foam is much bigger and more coarse than expected, and the shrimp can swim into it, but it works well to keep the baby shrimp from getting sucked into the intake tube for the filter in our 55 gallon tank. I had trouble finding a sponge cover that would fit over the intake tube, and this worked well.
Travis
2025-04-20 11:20:56
Really love this filter for the Pre-filter of our koi pond. Easy to replace and does a really good job as long as you aren't infested with Algae. What is not pleasing is just two months ago Amazon sold this filter at $4.99 each as an add-on item. Now it's June and they now are up to $9.99 ea. as an add-on item. Double the price in two months is ridiculous.
capnkid
2025-04-15 11:26:52
Bought pond fountain for small pond in backyard. Kept getting clogged because of sediments in pond. This protection will outlive the fountain. I cut a small piece of fabric and mount to outside of fountain and it catches all the sediment that gets in the pond. Cut a section and mounted it on the fountain, and still running strong two weeks later. No more pulling out old filter and washing it down. If, and when it clogs, just cut another small piece and put back on fountain. No more digging in pond every 3 days to clean filter. Great product for the price
Emmanuel gutierrez
2025-03-05 16:05:27
I, like many others here, used it as a prefilter with a canister filter. I think my experience is different because ive used other intake prefilters. I bought it because guppies were breeding and the fry could get sucked up, not for the extra filtration so i like how extra course it was, but to my surprise I noticed my tank became much clearer and for less than $5, it was a great quick solution for my future fry.However, the extra coarse of the sponge makes it quite difficult they when removing to clean the sponge. The small particulates would disperse quickly when i lift the sponge. I had to have the Vacuum going whenever i was servicing it.Ive had others prefilters in the past, Homemade, petcos, and Aquarium co-op. In comparison to Aquarium Co-ops intake filter holds the filth in much better when servicing it- Its was just the right amount of coarse SO, for like $5 more, i would get the the intake sponge thats less course, but still Course and greatly reduces my work load. This Sponge after all, it was made for a pond filter which receives much larger sized particulate than an indoors aquarium would ever. I would forgo the extra amount to get another prefilter for aquarium use. To top if off, its has the open hole all the way through, you have yo plug it up with another sponge.
B. Hurd
2025-02-22 11:31:45
This is the best aquarium investment I have made in terms of reducing time spent on the dumb fish. I have an aqua clear 110 filter and this works perfectly to reduce filter floss changing and clogging. I cut the length about 1.5 inches shorter so I could use it to fill the center hole at bottom. I just cut it a little bigger than the hole and stuffed it in and it stays perfect. When I clean it out, I use a big fine mesh net from petsmart ($6!) to enclose it before removing it. This keeps it from exploding all the crap as I pull it out. I then just dunk it a bucket and smash it repeatedly with the fury of fish keeper who spends inordinate amounts of time on a pet that lacks empathy and I cannot touch. Fish care about you about as much as a houseplant if you have an auto feeder. What a great prize at a carnival! AMIRIGHT?!
Proudvet
2025-02-05 11:37:22
I use this on the in tank inlet for my Oase Biomaster 600 canister . What I have done is eliminated the in canister prefilter on the Oase. By doing that I have increased Flow from filter and stopped purging issue .I originally used the Tetra sponge along with the Oase pre filter and found the Oase prefilter did not get dirty. All detritus was caught by Tetra Pond sponge. So I removed stock oase prefilter and now have the perfect combination for keeping my heavily planted and overstocked 55 gallon aquarium clean .Fish are happy and most of all I am happy . If you have a Biomaster 350,600 or 850 try this. Biomaster 250 does not have purge issues,I know because I own 250,350 and 600 .
Val
2025-02-01 17:31:50
This product was a perfect fit for my pond pump. Very happy with how clear my pond is
Farid
2025-01-12 16:30:08
Huge sponge! The photo is AFTER I cut it in half to fit on my Fluval 305 intake. It’s made for a pond, so it’s huge and rigid so keep that in mind. Good for modification of an aquarium canister filter intake with large fish. Small fish may still get caught in the holes
Extremely Unhappy Customer
2025-01-06 16:07:31
I modified this filter to fit a smaller pump. It is working perfectly to keep debris out of the pump.
Maverick T.
2025-01-04 15:19:38
Don’t buy for shrimps would be good for small fish
Rolf Walter
2024-12-11 16:42:06
I bought this pre filter sponge for my 45 gallon tank, and when it arrived and I unboxed it, it felt very weird. It didnt feel anything like other sponges. It felt SUPER plasticy. The holes are quite big as well. Not recommended if you have small fry.
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