Hipanda Filter Foam Sponges, Bio Sponge Filter Media Pad, Cut-to-Size Foam for Aquarium Fish Tank (10" x 4.7" x 2.75")

Highly compressed and took almost 2 weeks to return to stated dimension. Looks like it will work great as a replacement filter for a pump that I can no longer find replacement for.

It arrived flat, in a vacuum-locked package, very surprising! It expanded perfectly in a couple of days just by sitting on my counter. I'm using it around the pump in my outdoor water fountain, to keep the bigger leaves and such away from the pump. I bought the 7.5" x 4.7" x 2.75" and that is exactly what I received. I cut it to fit my pump with an x-acto knife and was easy enough to cut through the thickness. I will be ordering another one as I cut this one incorrectly (I should've measured twice and cut once), but it is exactly what I needed. I installed a simple $10 float and water supply hose to the fountain, so that I don't have to keep refilling it. I put the extra piece around the float to help keep debris away from it.

It's a sponge, it dose what bio sponge does best Great for letting water flow through and to filter out at the same time. I would say that this sponge is the spongeiest sponges that I have ever used. It can sponge flat or sponge standing up even sponge sideways. You can really show this sponge off in any direction. Sometimes I like to just throw my sponge in the middle of my sump just to collect all the good bio from the water. I wouldn't know what I'll do without my big sponge

This filter foam sponge is a great addition to any fish tank. It does an excellent job of trapping debris and maintaining water clarity. The only reason I'm giving it 4 stars instead of 5 is that it can be a bit difficult to clean. The foam is quite delicate, and I found that I had to be careful not to damage it when rinsing it out. But overall, it's a great product that I would recommend to any fish tank owner looking to improve their filtration system.

I love these. I bought them to set my aquarium air pumps on to quiet the vibration. Worked great

Great value and word great in my filter. Very durable and easy to clean. Amazon home delivery was very convenient

it was perfect for my turtle yank filter. 3 rd one I have bought from this seller.

Work as needed. Easy to cut/trim. My return was not properly counted and I was charged for one that I sent back.

To start off, I got these to make into microphone pop filters, so I can't speak to their effectiveness as an aquarium filter. That said, these things work great for my intended use. They come flat-packed, so once you get them out of the packaging just run them under warm water while wringing them around. In about 15-20 seconds they just inflate to full size. They're soaked now, of course, so let them dry thoroughly if you don't want tap water in them. For a microphone pop filter, they're very easy to shape using a sharp razor knife, and are extremely effective at reducing plosives. For my use case I do recommend.

La taille et épaisseur sont très bon. Avant utiliser il faut attendre 30 min et rincer avant utiliser.

Comes misshapen because it’s vacuum sealed. It will look like it’s cut improperly and all misshapen. You have to let it come back to shape and use hot water to get it square again. Once that’s done it’s fine and works as expected. I dock it one star for that and for the high price.

I needed replacement filters for my Waterbox 35.2 AIO reef aquarium. Waterbox customer service is useless and couldn't point me to their replacements so I came across these. A bit to long but width and height is a perfect fit, actually I get 2 filters from one foam so bonus! This pack yields 4 filters when cut to size! Showed up like a letter so compressed but opened it up and they slowly expanded. An hour of leaving them be is all that was needed for them to expand. DO NOT WET AND SQUEEZE WATER OUT AND OUT IN CLOSE DRYER! The dryer will have chemicals from softener sheets and will pollute the aquarium. Just give them a bit of time and they will expand to form. Some say they are not good if expecting to replace your filters straight away. Well if you been waiting for new filters then what's one more day? Honestly these are great and will be buying more.

It comes about 1/4" thick. Instructions say it takes 24hrs to expand. 72hrs later and still 1/2 as thick as ad says it is. Finally got it wet and stuck it in the microwave and presto, proper size. I get shipping is cheaper squished but if you're in a hurry, this isn't for you.