Originally Posted by Termato
What are these scavenger resins that can adsorb nitrates?
First, let me explain (whine - lol) about my high nitrates in my well water - the result of a 95 acre farmers field across the road that gets ample amounts of organic (manure) and chemical fertilizer! My well water has 80-100+ppm nitrates.
I use Fluval Lab Series Nitrate Remover
(FNR) in a spare 10g tank to filter nitrates from my well water to use for water changes*. In my 60g display tank, I sometimes use API Nitra-Zorb
Both of these products are synthetic resins (look a lot like tiny plastic pellets) that adsorb nitrates. They both do a good job and can be regenerated/reused several times in salt water.
(*I mix FNR filtered well water 50/50 with deionized (DI) water made using the API Tap Water filter
Another product I use is Seachem Purigen
. Purigen is a synthetic resin that adsorbs dissolved organics keeping water clearer and preventing the decomposition that would ultimately result in nitrates. It can be regenerated/reused several times using chlorine bleach. All this said, as I mentioned, with good nitrate free tap water for weekly water changes, living plants and good tank maintenance, nitrates can typically be kept very low.
I was forced to research and use these products to economically combat the high nitrates in my source (well) water.
Note: High nitrates (in drinking water) is a health hazard for humans, especially young children, and there are federal standards. Unfortunately, these standards can be regulated in sewage treatment plants and municipal water supplies, but not in rural America private water supplies. (The farmer can't be prevented from fertilizing his farm land).
Footnote: We have bottled water delivered for drinking.