AQUANEAT 9 pcs Replacement Aquarium Canister Filter Pads Compatible with SUNSUN HW-304B/404B/704B/3000 CF500 Filter Pads Bio Sponges

One of my canister filter for my 155 gallon fish tank is a Sunsun Hw304B bought in 2016. It has gotten partially clogged lately. My fish tank water became stink and cloudy. I could hardly see my fishes. Received the pads today and installed right away. About 4 hours later, the fish tank water became sparkling clear and not stink any more. The performance of these perfectly fit pads is way beyond my expectation. I thought it would take days at least. The price is quite reasonable too. I am glad I bought these pads instead of a new canister filter. Will recommend to anyone without hesitation.

This is great filter media. Easy clean and reusable. I use it in a different filter as well. The finer media lasts better than a year.

Works fine I use for my larger fish tank. And will buy again in the future.

Fits properly

These foams seem to be of quite good quality. I've used one set for over a year and they show no sign of breaking down or deteriorating in any way and have not shrunk as some low quality foams do. They're very precisely cut and fit the Sunsun/Polar Aurora x04 filters perfectly.

Exactly what it supposed to be works better than standard

If you want something durable and that will survive multiple cleanings, then buy these now. Uea the price is a little steep but you can use these Ling term. Always start with the more coarse sponge on bottom and work up to the finer one last. You can even double each one up if you want to!

Perfect fit