Problems With Cycling Tank

It does seem a bit odd that the ammonia vanished in 24 hours, but you don't give a nitrite reading so that's the next thing to test. Also, test for nitrate in both the tank and your tap water. If  the ammonia you added has gone, it must be somewhere. The reason for testing tap water for nitrate is that most tap water contains some; you have to subtract the tap level from the tank level to see if any has been made by the filter bacteria. If you have a liquid nitrate tester, don't forget to shake the one bottle extremely well before testing.
Did you test for ammonia 30 mins after adding it? That will confirm whether  the 1.65 ml added enough to get 3 ppm in your tank.
Although you've used new filters, there will have been some bacteria on the glass if you didn't clean it, some loose bits of biofilm could have come off the old media especially if you gave it a good squeeze/shake and the decor from the other tank will have had bacteria on them.


Yes, that ammonia is no good. The surfactant will affect both bacteria and fish - and all the other micro-organisms we need to grow. I suggest getting another bottle then wash everything in dechlorinated water - no good risking any bacteria you have by using plain tap water. In the meantime you could add some fish food to keep the bacteria fed.