So, there's a debate out there about what is the best product to use when cycling a tank. Bio-Spira is no longer made for freshwater use, however, the lead scientist (bacteriologist) now has a company with basically the same stuff so we'll say it's still available (specifically called DrTim's Aquatics One and Only). Tetra SafeStart is now the big name with most hobbyists. Microbe-Lift has been a big name in ponds and is now available for aquariums.
I'm wondering what people's experiences are with these products, in any tank, good or bad.
Poll available as well.