So what is nitrAte at then? Zero ammonia and nitrItes with fish in would suggest cycle completion for current stock if nitrAtes are high too? If this is the case, do a 40-50% waterchange, leave it a week or so then add some more tank buddies if you can fit them. Continue to monitor between now and then and abort further stocking if you see any raise in ammo or NitrItes. If no or low NitrAtes are detected all week then I would abort stocking as you are not cycled yet.
Why fish in cycle?
I just tested my nitrate its up to
40ppm thats said though I have been using TPN+ which has nitrates in it.
Why fish well tetra safe start claims you can cycle with them with no ammonia issues etc and they seem to be copeing fine I aint seen any huge swings in amonnia or nitrite tbh I aint had a nitrite increase as yet!
Have you checked your tap water and seen if you have any nitrates in there?
2 1/2 Weeks seems like a pretty short time for a cycle to be completed?
As far as tetra safe goes, it is pretty much a gimmick. The only thing it can do is "remove" the ammonia in the water(changed its properties so it is harmless to fish, but still detectable on your test kit), and if that is the case then there would be no beneficial bacteria in your filter.
If you take away ammonia then the bacteria that process ammonia into nitrite are not going to grow, and if they don't grow, then the bacteria that process nitrite into nitrate cannot grow.
This is a guess, but I am guessing that you never had a nitrite reading at all through this whole time? I could be wrong?
What I think is happening in your tank is that the tetra safe stuff you are adding is "removing" the ammonia, and when you do get a reading for ammonia you do a water change and take a lot of ammonia out. Then you add water back to the tank along with the tetra safe.
All-in-all there is basically zero ammonia present in your tank to get the cycling process going.
Like I said I could be wrong, and there could be some miracle that you are cycled in 2 1/2 weeks!
Check you tap water to see if you have any Nitrates present.
Have you ever had a Nitrite reading at all during this whole time?
-FHM