These are bulletproof hardy and voracious great algae eaters.
All the SAEs I've gotten have been very hard and resilient. Takes down algae exactly as advertised. Please note, they double in size very quickly, can reach about 6 inches, and, while not aggressive, are very hyperactive during feeding, tending to outcompete slower and more timid species if sharing a tank.
All items healthy and alive on arrival. Not to mention best shipping I've seen yet!