I thought, but had a few people tell me it was bad. I've been soaking food in garlic guard for ever. Always thought I made them healthy witch helped with ich and other problems. They just seemed very upset that I was using garlic. Idk
if you use in small amounts u are fine I have been using garlic guard by seachem for almost ten years an have no ill effect I can attest to the use of garlic , I just use a few ml in my food soak