Well, slider I am no expert but I can help a bit. Have you read the article
http://www.fishlore.com/NitrogenCycle.htm on the fish lore site? If not it is a worth you doing so. As I was looking through your records it seems weird to me yet not impossible i guess to have
nitrate at the beginning stages of your tank. Sounds like you have purchased an API master so I would be interested after you test Ammonia, Nitrite and Nitrate what your reading are. Some times tanks take months to fully cycle so there is something to be said for taking your time and waiting. There are also several thing you can do to speed up the cycle of your tank. Make sure to read the whole article about the
nitrogen cycle they have a section on starting the cycle that is where you want to key in. You need to be adding something to the tank to get it going. I went fishless. and it took me about 1 month to complete the cycle. I was actually have trouble at first but I went to my
LFS and they gave me some gravel from and established tank and (some people would not like this) but They took one of their sponge filters ans rung it out into a fish bag with water in it. I dumped that into my tank filling it with benificial bacteria. It was like home made bio-spira. That really helped. My tank had ammonia reading and nitrate reading. 1 week later 0 on both with 15
PPM nitrate, did a
water change and added two fish! I know this is long and annoying even sometimes but it is worth it in the end. So summary of suggestions 1) read the article. 2) get something in your tank that will START the nitrogen cycle. Keep posting if you have anymore questions I might be able to help. good luck!