Fluval Edge Pre-Filter Sponge, Replacement Aquarium Filter Media, A1387

This is probably the best foam prefilter brand on Amazon in terms of quality and filtration. However, the inner diameter is about 0.7 inches Not the half inch described. You may need a rubber band to keep in place. In my opinion, this foam pre-filter clears up cloudy water better than a protein skimmer and regular filter media. It does slow the water flow after a few days though. But, you can use this slower flow to your advantage by using a UVC sterilizer light in your filter. The slower flow rate will allow your water to be sterilized more efficiently.

Immediately solved my water turbulence issue on the betta tank. We have an ecocube aquarium which I had to replace the pump on and the new one has a higher flow rate. This pre filter fit perfectly over the output to completely diffuse the water so there is no more turbulence and betta is happy.

UPDATE: I have been using these Fluval pre-filters for the past few years now, andthey really are quite useful in easing the load on an aquarium filter's mechanical filtration.I have these pre-filters on most of my planted aquaria, and I clean them once a week, since the flow is noticeably slower by that time.The fact that the water flow in an aquarium filter can be down to a trickle within a week's time, after installing one of these pre-filters on its intake, should give the reader an idea of their superb filtering ability.These filters are also available on Amazon.com in 3 packs for about $4.88, including shipping. This is the best deal that I have seen on these pre-filters.The reader should also find of interest that while these pre-filters are sold for the Aquaclear 20 filters on the Fluval 6 & 12 gallon Edge aquariums, they can also be used on the intakes of most filters whose diameter is up to a half inch, since these pre-filters will stretch a bit.The key is to clean them weekly so that they maintain good water flow. Until you have used a pre-filter, whether it's the Fluval or one from another aquarium filter manufacturer, you have no idea how beneficial these pre-filters are in easing the job of the mechanical filtration in your aquarium filter.* Notation: In regard to Aquaclear filters, this author also uses an Aquaclear 50 and Aquaclear 70 as dedicated mechanical filters for fine filtering (water polishing) the water in my planted aquaria. I use the AC 50 on the small tanks and the AC 70 on the larger ones, and just move the filters from one tank to the next, after they have been micron filtered.I use the foam block on the bottom of the basket for these filters, with a 25 micron filter pad from Marineland atop this foam block, and an 0.5 micron pad from a wine manufacturer sitting atop the Marineland micron filter. This gives these filters the ability to polish an aquarium's water column as well as a dedicated diatom filter, like a Vortex D-1 or XL; both of which I also have.This setup is for those fishkeepers who don't want to make the investment in a diatom filter, and have a spare Aquaclear filter laying around.Earlier...As a fishkeeper, I have quite a few guppies that are constantly reproducing, as well as a pair of Panda Coryadoras who spawn regularly, producing fry.In the past this led me to purchase a sponge filter that took up quite a bit of room in my *guppy tank.* By the time my Panda Cory's started to spawn, I had already been using the Fluval pre-filters in their aquarium.The small size of the fry also forced me to turn off the hob filter that I was using at the time in my guppy tank, in order to prevent guppy fry from being sucked into its intake.Then I saw these Fluval Edge pre-filters online, and having recalled reading that the Fluval Edge 6 gallon aquarium uses an Aquaclear 20 filter, decided to purchase a few of these pre-filters to install on the Aquaclear 20 filters I was using on my guppy tanks.They have worked out extremely well, reducing the amount of detritus in my Aquaclear filters, while being much quicker to clean.You simply slip the pre-filter off the intake of the Aquaclear filter, rinse it under some tap water, and reinstall it. The entire process takes less than a minute.As such, this author highly recommends the Fluval Edge pre-filter for use on the aforementioned Aquaclear hob filters, as well as any aquarium filter intake tube that has a diameter of 1/2" or less.

Got this to prevent my shrimp getting sucked into the filter. Works well for that purpose. I find that it does get clogged up quickly and requires rinsing. Also it requires request replacement. About 2-3 times a year depending.

Perfect for keeping my little fish from getting sucked into the HOB filter. I have a planted/dirted aquarium (Father Fish style) so I have to clean this sponge like once a week but it's worth it. NOTE that if the power goes out, sometimes these sponges will fall off of the intake for the HOB.

I thought this filter would be bigger..... The inner diameter is not the size I thought it'd be I made it work but It restricted the water flow of my filter so I took it off and had to purchase something different. Overall this is for smaller pumps!The pump I own is a Tidal 75!! If you are planning on using this on that filter do not! It will not fit coorectly! The sponge is way too small!I'm giving this 5 stars because with the right filter it'd work great! But taking away stars because of my lack of research is not fair!

I bought these to cover the intake of my 10 gallon tank's "hang on back" filter for my betta fish. I have read horror stories of betta fins being sucked into the intake of filters and torn all up, so I wanted to prevent that for my little guy! This sponge fits perfectly over the slotted intake, and also catches algae well. When I'm doing water changes and tank cleanings, I just rinse it in water to remove any algae and put it back on. Works very well.

The media could not be loaded. It’s good for the money but the sponge I had before was better but it isn’t sold anymore, this does fit on the intake of any of the Fluval 07 series. Fits perfectly on the intake nozzle. None of my baby fish got sucked in nor did my shrimp. And my gourami loves looking at the water flow lol.