Randy Holmes-Farley
Reef Chemist
View BadgesStaff member
Super Moderator
Excellence Award
Expert Contributor
Article Contributor
R2R Research
My Tank Thread
- Joined
- Sep 5, 2014
- Messages
- 67,482
- Reaction score
- 63,877
You could also try a nitrate absorbing resin, I have not used them before but hear good things, the resin is rechargeable so the cost doesn't seen bad.
https://bluelifeusa.com/regenerable-resins/
I do not believe there is such a thing as a polymer resin that can selectively absorb nitrate directly from seawater.
Any effects seen with polymers is almost certainly from binding organic matter before it degrades (or random test variation).