I am having a problem getting the amonia down in my 3.2 gallon tank....I have done water changes....I started out doing 25% and that didn't help. I went to 50% today and added the Prime. It still is in green with the test strips for ammonia. I have fish in the tank as I did not know about the nitrogen cycle until after I added the fish. I bought everything in Petsmart. Today I bought a volcanic rock also...it is supposed to naturally remove amonia? Anyone familiar with this product? I don't know what to do next to get the ammonia down.....can someone please help me out? Thank you so very much!