I just started dosing Tropic Marin's Plus NP for very low levels of NO3 & PO4. It's my understanding that this particular method of introducing the two can't be tested for. Rather, they're in a form that's more readily available for corals to use but still won't show up on a test. Here's my question - should I also be dosing my standard NO3 and PO4 doses to keep the detectable levels up? I'm concerned that non-detectable PO4 might lead to dino growth and I want to avoid that. Can the non-detectable form of phosphate in +NP help inhibit dino growth? Since I can't test for NO3 & PO4 when using the +NP I'm very hesitant to dose both or one of those separately for fear of really screwing up my frag tank.