Healthguard restores and maintains correct bicarbonate alkalinity in your fish. This is essential for proper organ function, bright colors and overall health. Normal biological activity can cause the bicarbonate alkalinity levels to crash in your fish, resulting in severe stress. Healthguard replenishes your fishes’ electrolytes, which stimulate enzyme production, resulting in brighter, more vivid colors. Contains Absorptol for added benefits (see product description for details). Safe for all freshwater and saltwater fish, invertebrates and plants. For ornamental fish only.