I set up my 7.5 gallon 9 days ago. I haven't touched it besides topping off the water since. My ammonia is at .50 my nitrite is as high as my test reads at 5.0 my nitrates are at 20 ppm and my pH is 8.4. Would this be considered normal for only being 9 days into the cycle? Also in the pictures you can see the discoloration in the sand. I'm assuming it's algae. Is that normal or is something wrong?