Review on 🐠 Tetra Carbon Filters: Perfect Fit for Whisper EX Filters in Aquariums by Deanna Martinez

When I took these cartridges out of the box, the plastic frame which is usually white turned very yellow, the filter material was very brown, they looked almost used, I don't think so because the package was sealed. Both cartridges smelled very bad. I didn't use these cartridges because they were so bad I had to throw them away. I will never buy this item from Revain again, I found a few on the shelf at Walmart that were fine. I would not recommend this product.