Bottom feeders and algae eaters such as plecostomus, silver dollars, pacus and some species of cichlids will thrive on Wardley Algae Discs. Rich in blue-green spirulina algae, it naturally enhances colors, while stabilized Vitamin C aids in rapid tissue repair and increased disease resistance. Also contains a multi-vitamin supplement to support the overall well-being of your fish. Will not cloud the water when used as directed. Feed once daily and remove uneaten food after 12 hours.