Who Gives A Fish Forums

rileyon wrote: ↑Wed May 14, 2025 6:33 pm You can still keep SPS with nitrates at 10, but ideally you want to get as close to zero as you can.

hi ben,
get a small one, 2/3" and stick it in your 400l tank, see how it goes before upgrading, best to add it last, tang wise that is.