How much chaeto do you really need to make a dent in Nitrates? My nitrates were around 3-5 several months ago when I first got chaeto in my Solana and it's still around 3-5. The chaeto grows reasonably, meaning that the growth is noticeable and I trim it down a bit every few weeks. I also never saw any impact on pH even thought I light it from 8pm-8am.