I just killed all my Loaches!! I have this 46 Euro that was an all Loach tank except for 4 Killi's. I have had a problem with it lately with being a little cloudy. I run an Eheim 2236 and a Penguin 150 on it. It has been set up and running great for about 6 months. It has just always been a bit cloudy. I use Seachem Stability and Prime when setting up and from time to time just to keep things in good shape. My wife bought me a three pack of Seachem products for so holiday and I had never opened it. When I looked at it today I noticed it had Stability, Prime and Clarity in it. So I decide to give the Clarity a shot. It said it would not harm fish or invertebrates, BULL$&#@!! It also said that the water may get a little cloudy and smell like sulfur when first put in but would clear within a couple hours. So when I put it in the tank got a little cloudy and smelled like sulfur, so it must be working. Well I had to run some errands today and when I got back ALL of my Loaches where dead!! There skin was literally burned off. I used 1 capful just like the directions said. My beautiful 7" Yellow Tail Blue and Tiger Botia's. All of my Loaches: Yo-Yo's, Kuhlies, Skunks, Zebras and a couple Sand somethings. I never used a clarity product and now I will know to never use one again. A Brutal lesson learned. The only thing that changed in this tank was adding the Clarity product. Has anyone else ever had a problem like this?