12 Red Leg Hermits, 1 Tuxedo Urchin, 6 Turbo Snails, 3 Emerald Crabs. Want to defeat hair algae? These are your warriors! Every case of hair algae is different, but we've found this package to be effective for 50 gallon aquariums with some bad hair algae infestations. And if you've got hair algae, don't forget to check your water for nitrate and phosphate. We carry high quality test kits.