The day after the big water change and adding GAC, diatoms appeared. This is day 28 since I added the first bag of sand containing bacteria.
It's probably co-incidental that the diatoms appeared the day after I reduced nitrate from 75+ to ~30 mg/l and added GAC. My first tank took 25 days for diatoms to appear after adding the first bacteria.
It's probably co-incidental that the diatoms appeared the day after I reduced nitrate from 75+ to ~30 mg/l and added GAC. My first tank took 25 days for diatoms to appear after adding the first bacteria.