Algadrex Colombo - Treatment against green water. Discover Algadrex products on our online store. This product is a flocculant that allows you to act quickly on green water. Please note, before using any flocculant, it is essential to check your water hardness and to properly oxygenate the pond. The binders contained in the flocculant, with a low hardness, can be toxic to fish.
