Q-Tank Cycling Question

[Beverly]

This is a dumb question that I should know the answer to, but am unsure of.......

I set up a bare 20g Q-tank two months ago. It has a heater, glass lid, an NO light of some sort, pvc elbow and T, two small powerheads, and an AquaClear Mini and AquaClear 200 both filled to the max with foams for maximum surface area for bacteria growth. Fed it heavily for use with two fish. Cycling seemed to take forever, but it finally cycled.

Okay, then, the tank cycled. I cleaned out all the algae, cleaned the foams in outgoing changewater and did a 100% water change. Put in the two fish that had been in my 72g tank of doom where the fish had ich off and on.

Fish have been in the Q-tank for over a week, no sign of ich. Hooray!!

Dang. Once I put the fish into the tank, I got .4 ppm ammonia and .2 ppm nitrite the next day. Have even been suctioning out all leftover food and poop. Had been doing twice daily 50% water changes to keep the fish eating, but then remembered that adding Prime would neutralize the ammonia, so I've been doing that daily and skipping some of the big water changes. Fish are eating well, no signs of ich. Hooray!!!!

Anyway, my question is this: Prime converts ammonia to ammonium. Are the same bacteria that process ammonia into nitrite the same as the bacteria that process ammonium into nitrite? I'm pretty sure the answer is YES, but I need to check this out.

TIA