I believe so , I know there are additives as well, like tetra safe start or dr tims for freshwater . I used biospira on my salt tank and it cycles in 9 or 10 days. I don't really want another tank , but long story short , niece won a beta at a birthday party , and she's too young to know how to care for it , and it's living in literally 3 inches of water Ina tiny plastic container . So I was just going to buy a tank for it to live in and have room to swim. I think it's $60 and comes with whole filtration and lighting system . Just have to buy the rock and stuff.