Mark, Is what you wrote heresay? I've used it for years on "scaleless" fish such as Loaches, etc. without any problem. Merrill Cohen Pikesville, MD Mark wrote: Subject: Re: Using Clout for Planaria Hi Davy, Just wanted to let you know if your going to use Clout as someone posted. Do not use if you have scaleless fish. Such as loaches. Just thought you should know. Mark Robinson