Passwell Multi-Clens 1% 250ml. Multi-Clens is a water disinfectant for caged birds and animals. Uses: Add to drinking water to maintain a clean, healthy water supply. Use when preparing soaked or sprouted seed to help maintain freshness. Use as a general disinfectant for cleaning feed containers and cages. When used according to directions Multi-Clens is safe to use daily for birds and animals.