I recently purchased an AquaOne AquaNano 22(5 gal) fish tank from my local pet store just 2 and a half weeks ago and it has been up and running now for nearly to weeks. Maybe I should of left it longer but I took a sample of my water in and they said it was fine so I went ahead and got 4 Balloon Mollies which they also said was fine and that they would fit in their just nicely. This I found out was not correct and in fact they need a larger tank, so I'm going to purchase an AquaNano 40 which is 55l(12 gal) would they know fit in there, even when they are fully grown? It will talk me at least a few days to get a hold of the new tank and then the filter has to mature for a month or so after so will they be ok until then? I did a 15% water change earlier on and then tested the levels in my tank, it read: NO(3)-100+ NO(2)-somewhere between 5&10 GH-16d KH-10d pH-7.6 CL(2)-0 Temp-25c-28c I then did a further 10% water change and the results were maybe slightly a bit better. What else can I do to get the nitrites and nitrates down before my fish die?! Ps: one potentially could be pregnant from when I bought her.