I tried algone which did not remove any measurable nitrates it did remove a great deal of phosphates or algae and swelled up with algae (or water not too sure it happened progressively). My advice having tried algone and nitraban and everything (But a denitrifier) to lower my nitrates that are 20-40 from the tap is just do water changes a reading of 40 aint that bad. I would like a link to this product as it has piqued my interest lol (My lazy side talking) Im working on my RO this weekend so hopefully it won't be a huge issue.