This is not a problem, but just so you are aware...sometimes bacterial supplements can increase cloudiness in the tank water, due to the sudden influx of bacteria and organics. Other bacteria rapidly multiply to feed on the organics. It is not permanent and not dangerous to the cycling.
Not that it really matters here, but the bacteria in these supplements is not all the same. There are only two that I know of which do contain the actual nitrifying bacteria species, and these are Dr. Tim's One and Only and Tetra's SafeStart. The Tetra formula was developed by Dr. Tim Hovanec (the same "Dr Tim" developer of the first product mentioned). I researched into this extensively some time back and the following excerpts may be of interest.
Nitrification is the oxidation of ammonia/ammonium to nitrite and then the subsequent oxidation of nitrite to nitrate; this is performed by two groups of bacteria known collectively as nitrifying bacteria or nitrifiers. True nitrifying bacteria are autotrophs [see definition below]; they use chemosynthesis to manufacture their energy by using oxygen plus nitrogenous waste (ammonia or nitrite) and carbon (from CO2). There are several different bacterium species involved, all in the family Nitrobacteraceae, that carry out this function in soil, and it used to be thought that these, particularly Nitrosomonas europa and Nitrobacter, were the nitrification bacteria in freshwater. But Dr. Timothy Hovanec led the team of scientists that proved this to be a mistaken assumption. Ammonia is converted to nitrite by bacteria of the Nitrosonomas marina-like strain [2] and nitrite is converted to nitrate by bacteria closely related to Nitrospira moscoviensis and Nitrospira marina. [3] With several subsequent scientific studies by other scientists on wastewater nitrifying bacteria this data is now accepted scientific fact.
Autotrophic bacteria synthesize their own food, and they require oxygen so they are termed aerobic. Some do this via photosynthesis using sunlight, oxygen and water. Others use chemosynthesis, a process whereby they manufacture carbohydrates from carbon dioxide (CO2) and water using chemical nutrients rather than sunlight as the energy source. Science now believes that chemosynthesis was what allowed life to begin on earth, a view supported by the fairly recent discovery of the remarkable ecosystems around the hydrothermal vents on the ocean floor that have absolutely no relationship with sunlight—conditions very similar to those that initially existed on the earth for hundreds of millions of years before any form of life appeared.
The nitrogen cycle bacteria in aquaria are lithotrophic; the word comes from the Greek lithos [= rock] and troph [= consumer], so literally it means “rock eater.” Realistically, it means these bacteria colonize surfaces. The scientific processes that cause this may most simply be described as the bacteria being pulled from the water by several actions occurring on the surfaces. Bacteria are sticky; they exude protein coatings that allow them to build up into a slimy film that we term a biofilm. These also attract and bind fungi and algae. Snails, shrimp and fish seen grazing these mats are feeding on the countless microscopic creatures and algae that live there. But this is not their most important function; these biofilms are absolutely essential to a healthy aquarium because of the bacteria they contain.
Dr. Hovanec examined some of the cycling products such as Nutrafin's Cycle and found that while they do not contain the actual nitrifying species of bacteria, they do somehow speed up the cycling process. We need not get into that, but suffice it to say that even products like Seachem's Stability will provide benefit. I would use Tetra's SafeStart if available, but I have used Stability and it seemed to be effective.
References for the above:
[2] Paul C. Burrell, Carol M. Phalen, and Timothy A. Hovanec, “Identification of Bacteria Responsible for Ammonia Oxidation in Freshwater Aquaria,” Applied and Environmental Microbiology, December 2001, pp. 5791-5800.
[3] Hovanec, T. A., L. T. Taylor, A. Blakis and E. F. DeLong, “Nitrospira- Like Bacteria Associated with Nitrite Oxidation in Freshwater Aquaria,” Applied and Environmental Microbiology, Vol. 64, No. 1, pp. 258-264.
Maybe miss a day then test again, and follow this pattern till you've got ammonia under 0.75 and nitrite over 2.0. Patience is the name of the game now - if you add too much ammonia too soon, you risk pushing nitrite over the stall level.
