I have 3 different types of loaches in my tank. Yoyo, striated and skunk. They have been very hardy and no problems with any disease. There has also been no problem with the substrate - i am using flourite. However, I did have two cory cats that lost all of thier barbels and eventually died. I don't know if it was the substrate or the pesky loaches to blame - I have wondered if the loaches didn't nip them off? Also, the only complaint I have about them is that they do root around the bottom of the tank and they have dislodged some stem plants here and there. Nothing major - minor annoyance. They definitely are snail eating machines and fun to watch. Terry Barber in GA ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/