Review on 🐟 Enhance filtration efficiency with OUFISH Aquarium Bio Balls – Ceramic Filtration Rings for Fish Tanks & Ponds! by Brenda Mitchell

This is a very worrying product review. Please do not advise buying this, especially from the GreenUShop seller. Before that we had an aquarium with healthy fish. We regularly check the water and carry out frequent water changes. Just before the filter media was installed our fish looked healthy and our water was in good condition. Before installing the filter material, we washed it and soaked it in water. Once we installed the filter media, within 2 hours our fish looked like they were struggling. We immediately did a water analysis and found that the nitrite levels had risen to dangerously high levels. We tried our best but after an hour all the fish in the aquarium died. Whatever is in this environment is obviously very toxic to the fish and it is incredible that anyone would sell it to fish owners. Please heed our warning and do not buy this product! Also, everyone should avoid buying anything from a fraudulent and careless GreenUShop seller.