Yup. Me too. I thought I was having a flashback from my Reef Crystals days. I keep my Alk at 7.5 an like to store 55 gallons for a few weeks which is the main reason I use TM Pro. But I don't enjoy spending 20 minutes cleaning my storage container. I'm gonna see what other salts have lower Alk and can be stored.Does anyone know if TM changed the 'recipe' for Pro Reef? I have used the salt for a while and mixed in a white bucket with never any residue. I am now on a new bucket and I am getting a coating of brown gunk on all surfaces of the bucket and on the mixing pump. I can even see the water has a brown/orange tint to it once the salt dissolves.