Well I have experienced a nitrite spike over the course of the past couple weeks. I have been measuring nitrite levels in the 1-2 ppm range. I bought a 30 gal aquarium that I moved the PS into, which I think is helping my cause because it holds more water than the tote I was using. I am performing 40% water changes daily. I also have some Seachem Prime that I am adding every day to neutralize the toxicity of the nitrites. I have lost three of the fish so far, so I am hoping the filter cycle will stabilize soon so I can start feeding again and stop stressing the fish.