When will ammonia spike on cycling 55g fish tank?

I'm cycling a 55g & 20g tank. I put water in both tanks let temp stabilize for 2 days. put 5 large danios of unknown breed in 55g and put 3 zebra danios in 20g on 2-14-09. three days later water went alil cloudy has not cleared yet. amonia, nitrite, and nitrate are all at 0 ppm levels. I have ben usisng biozyme freeze dryed bacteria sence i put water in tank. wen should i notice amonia as a start of cycling process? filter on 55g aquaclear 70, filter on 20g tetra ex 30