Aillsa Aquarium Canister Filter Pads Sponges (9 pcs) Replacement for SUNSUN HW-304B/404B/704B/3000 CF500 Filter Pads Bio Sponges

Thank goodness they vacuumed sealed nine foams to save space as backup parts. Most times they don't. My HW-404 foams are about 3 years old, and time to be permanently replaced.

I'm writing this review to remind myself NEVER to buy these again. The filters you receive initially with the Sun Sun canister filters are great! Properly sized and do an excellent job of filtering. When this package arrived I honestly thought it was a bad joke. These appear to have been cut by a 4 year old using safety scissors. These filters do not begin to cover the surface area of the Sun Sun canister trays. Additionally, the sponge material is very brittle. I threw mine out after taking this picture.

The product once out of the packaging appeared mangled, like it wasn't cut properly. The quality was inferior to others I have bought for less money. I will be returning it and ordering from another manufacturer. Very dissatisfied.