Review on 🐠 DaToo Mini Betta Flat Fish Tank Heater - Efficient 10W to 30W Small Aquarium Heater by Andrea White

At first it was an excellent heater. It kept the temperature stable, but after about 7-8 months the heater's black coating began to peel off and the water turned brown. Luckily my fish is alive and happy. I've wanted to take advantage of the one year warranty since this product was purchased on July 16, 2019, but I can't find any contact information or information on how to activate it. I hope DaToo sees my review and gets back to me.