We've been having some nitrate spikes in our water system, and while we are exploring long term options for prevention, I was wondering if anyone could suggest any of the immediate additives that should reduce nitrates quickly when that happens. I listed a bunch of examples I found below. Any work better or worse than others? We used some Purigen but it didn't seem to do much.
Examples
Liquids:
www.marinedepot.com
www.marinedepot.com
Pads:
Thanks!
Examples
Liquids:

NO3:PO4-X Nitrate & Phosphate Reducer
Prevent algae breakouts by removing the nitrates and phosphates in your reef tank. NO3:PO4-X Nitrate & Phosphate Reducer from Red Sea is a complex of carbons each with a different strain of microorganisms in a reef ready solution. Three Sizes Available 500mL 1000mL 5000mL Red Sea's NO3:PO4-x...


NO3:PO4-X Nitrate & Phosphate Reducer
Prevent algae breakouts by removing the nitrates and phosphates in your reef tank. NO3:PO4-X Nitrate & Phosphate Reducer from Red Sea is a complex of carbons each with a different strain of microorganisms in a reef ready solution. Three Sizes Available 500mL 1000mL 5000mL Red Sea's NO3:PO4-x...

Pads:
Thanks!