I'd be super careful. My LFS recommended a product, sorry forgot the name, for my pond. I followed the directions to the "T" and withing 3 days all my koi had blood streaming from their mouths and gills. I lost all my koi, some 10 years old. I was soo mad when I went back to the LFS that the owner later told me he thought I was going to beat him up. I said no, just stop carrying that stuff.