Brightwell Replenish 2L crested Compatibilities: There are no known Size:137gal 60"x18"x29" Compatibilities: There are no known compatibility issues with the use of Liquid PraziPro® except for use in marine (saltwater) systems where flatworms of the Polycladida order are being cultured and when used where feather duster worms (sabellidae) or delicate worm type relatives are kept when a filter stops working due to power or mechanical failure or if existing beneficial bacterial colonies are lost due to the use of medications or sudden change in water conditions Formulated by a marine scientist Composed of purified water and ultra high purity materials