Large Cell Amphidiniums are the hardest to kill of the bunch. It is likely to be more than one type in the system. Starting with UV will remove the type (unknown as of now) that will enter the water column at night. Typically after 1-2 weeks of UV you should see a decrease in that Dino. You can continue to run the UV while dosing silicates to 4ppm, but the UV will have a small affect on the diatom bloom. You want the diatom bloom to show up because they will out compete the LCA if that is in fact present. This method much easier than blasting the rocks and trying to manually get them into the water column as research shows UV has little impact on them anyway. If you read Jason Mack’s direction it is all outlined exactly how to fight each type most efficiently and effectively. I am not an expert, but only giving some insight as to what worked for me fighting Ostreopsis and LCA at the same time.Assuming it’s a dino that’s not large cell, how would you treat that specific type differently? I’d pick silicate over a black out everytime. Silicate isn’t unnatural or damning in any way.
What specifically would you do different with an ID?