Thats just about what I had when I cycled- except for I had an aqua c skimmer. Now, what do you have for a substrate and what did you use to start the cycle - uncured LR, dead shrimp, live fish? This is really long for a cycle, and you've already done water changes... I'm thinking you must have had a huge ammonia spike from the method you used, converted to nitrite & now you're seeing the prolonged nitrate spike from the initial amm. load. Anyone else have any ideas?