Review on ✨ Aquapapa Aquarium Filter Media Zipper Mesh Bags: Ultimate Solution for Pellet Carbon, Bio Balls, Ceramic Rings and Ammonia Remover by Emily Armstrong

These media bags have a metal zipper. For those who don't know, metal in an aquarium is toxic, especially in seawater. In the filter, it is subject to corrosion and rust. Then comes the metal coating. Who knows what chemicals were used in the manufacture. If you have a freshwater aquarium and can hold metal out of the water, then you're fine. But if you have salt water you cannot use these bags as the metal will corrode and rust just being around salt water. I offered the seller an alternative media pack with a plastic zip-through closure. Although the bags are not suitable for aquariums, the seller support is top notch. He solved the problem for me immediately. So definitely a serious guy.