I'm sure that this subject pops up in waves, but as I'm new to online
forums/groups/blogs/whateveryouwanttocallit...

Has anyone had luck with external denitrification filters that don't
need to be fed? If so... Can we talk about the design?... Thanks...

FYI I'm looking to start a custom 32 gallon reef in a friends house
and was just playing with a few ideas on ways to make her life easier...