eco23
Aquarium Advice Addict
The nitrAte dropping must have been a testing error. It's impossible to lose that much nitrAte in that time frame. The only way nitrAte is removed from a tank is by water changes, plants will consume a small amount and anaerobic bacteria will convert a tiny amount into nitrogen gas. But nothing would have done it that fast unless there was a water change in between tests.
Make sure you are shaking the #2 solution for a full 30 seconds, shake the entire solution for a full minute, wait 5 minutes and record your results then.
You should also do some looking around for another fish store if possible. Hopefully you have a local privately owned lfs somewhere in your town. If you don't have a quarantine tank...I'd be very afraid to buy my fish at Petsmart. They have a notorious history of selling sick and infected fish. There are also a lot of people on this site who breed and sell fish who you can order from. I get all of my fish through the mail.
Make sure you are shaking the #2 solution for a full 30 seconds, shake the entire solution for a full minute, wait 5 minutes and record your results then.
You should also do some looking around for another fish store if possible. Hopefully you have a local privately owned lfs somewhere in your town. If you don't have a quarantine tank...I'd be very afraid to buy my fish at Petsmart. They have a notorious history of selling sick and infected fish. There are also a lot of people on this site who breed and sell fish who you can order from. I get all of my fish through the mail.