Crystal Clear Aquatics AAD00269 Zap-Tasia Control Gel Starter Kit This is a unique all natural, non-toxic solution to aiptasia growth in marine aquariums The slow dissolving formula allows the components to grip the anemone, ensuring complete control of regrowth Zap-tasia control gel is fish and reef safe Zap-tasia control gel can also be used to combat other nuisance anemones and polyps Any excess gel will dissolve over a short time and is harmless to tank and inhabitants