anyone ever use this product

Has anyone ever used seachem's de*nitrate or matrix? I was thinking of getting it to help remove the nitrates in my tank.


this is the info on it:

de*nitrate removes nitrates, nitrites, ammonia, and organics from both fresh and marine water. The high porosity of de*nitrate supports the proliferation of both aerobic and anaerobic bacteria that further remove these toxic aquarium byproducts. Even when exhausted as an organic adsorbent, de*nitrate continues to be an excellent support for the biological filter and does not have to be removed.
Directions: For best results, de*nitrate should be placed to assure the flow of water through it, such as in a canister filter, chemical filtration module, or box filter. Flow rate should not exceed 200 L (50 gallons) per hour. If higher flow rates are unavoidable, use Matrix or Pond Matrix. It is best to rinse off dust before use. Once de*nitrate has been in use for several days, nitrate concentrations should start to fall and level off gradually at a concentration of about 4–5 mg/L as nitrate. As long as nitrate concentrations remain under control, the product is not exhausted. Each 500 mL of de*nitrate treats about 100–200 L (25–50 gallons), depending on initial nitrate concentration and the current biological load. Enough should be used to remove nitrate at a rate at least as fast as the rate of formation. If very high nitrates are initially present, they should be brought down to less than 20 mg/L with water changes

 

I've only used Kent's Nitrate Sponge works the same. It does work just really slowly so it's not a miracle cure but it helps.

 

What's the point? You have to bring the levels down to 20 before using the product but at that point you don't have a problem any more, or can continue with water changes a bit more to lower it to what you are looking for.
Personally, I would rather buy some more live rock to enable the processing of the nitrate naturally.
I don't actually remember ever checking for nitrates in the 13 yrs I've been in the hobby, so either my live rock takes care of it for me or whatever levels it achieves have no impact on my inhabitants.