ZAP-TASIA control gel is a unique all natural, non-toxic solution to Aiptasia growth in marine aquariums. The thick gel fills the anemones' mouth or oral disc while encapsulating its tentacles and planuala. 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. Any excess gel will dissolve over a short time and is harmless to tank and inhabitants. Any localized pH decrease dissipates quickly. ZAP-TASIA control gel can also be used to combat other nuisance anemones and polyps.