Hi guys I have an old grow tray that I plan on using as a frag tank. The previous owner used it to grow marijuana. I want to get rid of any possible leeching of previous chemicals or fertilizer used. I stopped by a hydroponics store to buy a new tray and they recommended this stuff... anyone know or heard of it? They said it’s all enzymes and they use it to clean old trays. It’s non toxic and biodegradable.
