Mkay. Ive seen the tank in person, witnessed the signs, i can say without a shred of doubt that the tank is cycled.
SeaChem makes some products for use in either fw Or sw, and some that work for both. There's no reason to misrepresent Stability as working on both. but think what you want.I used a saltwater specific one. I think stability is only for freshwater. Saltwater bacteria is different than freshwater so i know any additive products labeled for both fresh and salt use is full of crap and shouldnt be trusted.