Nano sapiens
New member
I think this may be the main question as their can be a significantly higher cost for live rock vs the other products given the amount of live rock needed vs an equivalent amount of the different seachem products. The OP specifically spoke about de-nitrate which is for small systems, but the same equation would play out with Matrix and then Pond Matrix. Even if in my case you are starting with dry rock, the amount of space required in my sump would the difference between filling my entire sump with rock vs what is about 1/5 of that space.
If a tank has just LR, then one would need a fair amount. With LR and LS combined, there should be no problem. Cared for LS alone in 1" or a bit more thickness can usually handle a standard reef tank's denitrification. It's all I use in a 12g nano with a regularly vacuumed SB.
Except for certain unusual setups that are without the sites needed for adequate denitrification, I just don't see the need for this product. But, can't hurt, I suppose.