I recently started a new bio cube 32. Under the advice of my LFS I started out with fritzyme turbo 900, live rock from their tank, and live sand. I added frozen fish food as ammonia source. After two weeks cycling my readings for Ammonia, Nitrite were 0 and Nitrate was 5ppm or less. I did a 20% water change cycled 24 hours and added 3 fish. Now 24 hours after adding livestock my Nitrites shot up to 0.50 and Nitrates to 20-30 ppm, ammonia still 0... I quickly added some Seachem Prime to drop my levels what is my next step? 50% water change while using prime or just try only water change? Please no insults that the cycle wasn’t finished and I should return fish to store because that is not an option at the moment and I was only going off of what the LFS told me. I took water to them to test regularly. I have a strong algae growth also. Thanks