These sponges are huge!!! Great investment and they are almost invisible with a black background. Very happy , I highly recommend. Thank you.

Bought this and the ac20 intake adapter. For a shallow nano tank this is a must if you’re planning to run an ac20!

Love these in combination with the Tidal Optimizer. My only complaint is I wish the Large was a little less LARGE. Need to figure out how to shave it down to a smaller footprint.
Two of these in my 75g are a big unwanted attention grabber.

Needs to be called Easy Shop (Easy Green, lol) with how easy it is.

Good selection of pre sponge sizes 👌

I bought one of these for my FX6 and one for my AC110 along with the 3D printed adaptors. They trap waste particles and uneaten food. I see my fish eating the food on the pre-filter often, which is great. They really cut down on the overall filter maintenance too! Highly recommend for anyone!

This sponge is a game changer! It fits perfectly as advised for the Tidal Optimizer! It really disperses the draw into the filter, but I can have higher flow going out.

I absolutely love these Aquarium Co-Op coarse pre filters for both my Fluval 207 canister filters and my Seachem Tidal 55 Aquarium Co-Op Easy Seachem Tidal Optimizer. I was having issues with a fine pre filter on my Fluval canister intakes getting clogged and causing the filter to sputter. Not the case with the Aquarium Co-Op large coarse pre filters!!!!

this pre filter was purchased in conjunction with the SeaChem Tidal optimizer. Does just what it says… keeps fry and other babies safe while also keeping the main filter material less gunky. Also adds a TON of surface area for your biological filtration. I just vacuum the debris off when I do water changes.
I thought it would be huge and ugly in the tank, but it is behind a large (fake) plant and blends right in to the background. Up close you can see it but really only if you are looking for it.
10/10

This sponge is just what I needed to slow down the flow for my betta fish! The mini sponge fits perfectly over the outtake and reduces the flow of water to the perfect speed—it’s now calm enough to not push my betta around but still allows enough flow to filter the water. Highly recommend!

It's a prefilter sponge that does prefilter sponge things... I use one of them at the end of my water change hoses and my first one lasted about 4 years(mainly because the turtles would chew on it sometimes)...! Another great product...! Keep up y'alls awesomeness...!!!

When I saw the Aquarium Co-op video on their intake filter. It made a lot of sence to me. In general it has kept a lot of unwanted things from clogging my canister intake. Plus given the added benefit of extra space to grow benefical bactiria which has seem to have been apart of the process to calm down my nitates and nitrites, bringing more stability to my tank.
My posted pic is about a year ago.

I modified a medium to work with my Aquaclear 20. Just what I was after. Now it fits between the intake tube and the glass in my 15 gallon tank.

Perfect for my inlet tube.

I have 2 planted 75 gallon aquariums, both dirted. I’ve used hang on the back filters and have the fluval Fx canister, but I rely entirely on these sponges and the Aquarium Co Op powerheads for one of my tanks and love the ease of use, the ease of maintenance, the extra biological filtration, the ability to remove cycled sponges for treating tanks and starting new ones. These are durable and more than adequate for all but microscopic mechanical filtration.

I am using 7 of these and they work well and last well.

I tried these on H0B filters, but I don't like HOBs--too loud, too prone to issues. I like Oase cannister filters, particularly the Biomaster 250 and 350 which come with an internal pre-filter. Coincidentally, or maybe not, the COOP pre-filter sponges fit perfectly as replacement sponges in those pre-filters. A little snip with scissors to make the sponge a cylinder, and it slides right onto the Oase pre-filter perfectly--2 sponges for the 250, 3 for the 350. These are easier to clean than the ones that come with the Oase, but just as effective in my experience.

What was I waiting for? I’ve been dealing with pre-filters getting plugged up and full of sludge that I’d have to change them before a week was even over. Thought this was a little expensive to pay for + shipping, but it was worth every penny! So glad I have this product, it works great! You cannot find it on Amazon, I wasted money there :-( Aquarium co-op, knows what they’re doing with this extremely course mesh pre-filter. ;-)

I love these. So much better quality than the competition. I have 3 and couldn't ask for any better