I already have 2-20gal & 1-5gal Hydro sponge filters that I purchased from Angelfins sometime ago now & the tanks they are in remain crystal clear.

I recently purchased the Deep Blue Professional 40gal sponge filter from another company for my 20 gal tank, which presently houses 3 female Platies & about 3 newly born fry.

This sponge filter claims that more water passes through it than any other sponge filter. However, my tank was never clear.

I then decided to purchase the Hydro 40gal sponge filter from Angelfins & my water is now crystal clear. I am truly delighted with the results. All my tanks now that contain the Hydro sponge filter are crystal clear.

You can't go wrong if you purchase any Hydro sponge filter. They are without doubt top of the line.