rikka “Methylene Ultra” is a classic remedy against fungal and bacterial diseases of aquarium fish and for preventing stress caused by transport or transfer.It speeds up healing of wounds caused by infections and is safe for eggs and fry.Corals and other invertebrates in marine and fresh water do not tolerate the product.Recommended for experienced aquarists.DIRECTIONS:Shake before use!1 ml per 6 l of water. One dose lasts for 20 days of treatment.In severe cases: 1 ml per 10 l every 5 days until the end of treatment (decided by the aquarist).Before each treatment, change 30-50% of the water.To disinfect eggs: 1 ml per 20 l.After treatment, filter the water through activated carbon (rikka “Carbon Active”) for 24 hours.rikka “Aqua Start” helps re-establish beneficial bacteria in the aquarium after treatment.Shelf life: 24 months.Composition: methylene blue 2%, 99.99% silver nanoparticles 10 ppm.Volume: 100 ml and 50 ml.Manufactured in accordance with TU U 20.5-3348315741-001:2015.Not a veterinary medicine!