Cascade Koi & Aquatics have sold NT Labs products for many years and we stock many of the products by NT Labs across the range. NT Labs Algae Gone is suitable for coldwater & tropical aquariums. Algae gone is a flocculant which clumps algae and other particles together allowing the filter to strain them out. Green water/algae or cloudy water caused by over feeding and fish waste is unsightly and can be dangerous as it may alter the pH and oxygen levels in your aquarium. Algae Gone is a single dose plant friendly treatment that will clarify the green or cloudy water in your aquarium. It works by clumping the minute particles together enabling your filter to strain them out.