I disagree because the macro was dying prior to adding neonitro and neophos because the nitrogen sources were 0Simple biology. You are trying to fight biology with chemistry, based on flawed hobby test kits and the myth that glass box hobbyist have believing 0 nutrients causes dinoflagellates. You have a 30 gallon tank with multiple fish that you feed large amounts of food. Regardless of your test kit readings, you have an excess nutrient problem, adding Dino X might kill something but that will release more nutrients in an already polluted aquarium. Clean the rock, crud, and detritus; stop adding stuff and get back to the basics.