rabbut
I don't bite, all that often...
If you can't getfish untill the weekend, you should add ammonia twice dayly to keep those presious bactiria fed. Look at it this way, at least you are able to ensure it is fully cycled now before fish go in, by making shure that ammonia and nitrite stay where they should.
If moving the filter helped, then lack of air is probibly what did the stall earlier. It may also explain the loss of nitrate, if you filter went anairobic
Congratulations
Rabbut

If moving the filter helped, then lack of air is probibly what did the stall earlier. It may also explain the loss of nitrate, if you filter went anairobic

Congratulations
Rabbut