I have a 30g biocube that I've had running for over 7 months. Just added a 10g sump a month ago. I have a vipar spectra 350 light that I was running for 14 hours a day and was having a huge cyano bloom constantly with ammonia, nitrites, nitrates and phos readings at 0. I recently cut my light cycle to an 8 hour cycle but my nitrates are still at 0. I have a protein skimmer, chemipure and carbon pellets in my sump. Should I turn off my skimmer? Remove carbon and chemipure? Any advice would be appreciated! Thanks!