Last week started with a 15% two filter clean and had two 2% vaccumings and ended with ~8ppm NO3. This week started with a 5% two filter clean and will get daily 1% vaccumings. Have moved the rotala to the surface.
WEEK 2: 5% with both foam filters cleaned and one 3% vaccuum mid week = ~ 8 ppm. NO3
Obviously, my nitrates are not a problem. The sponges are certainly the main source. Unfortunately I can not say much about the increase in nitrogen consumed by the now emergent rotala since I made the change at the same time as changing my cleaning routine.