NUTRIENTS (for dino problems caused by lack of nutriens).
I had dino before which killed half of my tank. It was close to a year of struggling and at times feeling like I was completely losing the battle and was about to quit the hobby altogether. After trying pretty much everything I had on the table, I was destined for the last resort - nutrients. And it worked. Contrary to the popular belief that dino should be eliminated by nutrient control or Alk raise or H2O2, dino does not fear them and it is competitive enough to always be able to outcompete other bigger organisms such as green algae for nutrients and they would always come back if the root of the problem is not solved. So I unplugged my BP reactor and kept only a skimmer in the sump. I introduced some new fish into my tank and started to feed heavily. Several months later green algae started showing up again with dino still present. Then several months after that dino went away, slowly. After dino was gone corals were growing again and the colors were just fantastic. If I had given up, I would have never seen my tank as beautiful as it is today. My LFS also had a dino outbreak in their tanks and I worked with the store to try out different things and eventually the nutrient method also got rid of dino in their tanks as well. I still think that it may be back to the basics - competition. At the end of the day it really is about balance and stability. Dino shows up, in my experience, when the nutrient level is low and algae are starved to death. Higher nutrient level allows competition which may contain dino population. All of our tanks have dinos of some sort. It is misguiding, in my opinion, to recommend that people reach undetectable nutrient levels (NO3 and PO4). Not only will corals starve to death, weed organisms such as dinos can overpopulate in such conditions. Nowadays reactors and media are so effective it becomes a problems as I often come across peoples tanks that are starving, corals pale with little zoo. I know many people who have played with undetectable or very very low nutrient levels and resulted in a crash / large loss of corals by or partially by dino outbreaks when their nutrient levels accidentally reached zero. So don't play with UNLS unless you are well experienced and well informed. Many people for example at WWC they keep higher-than-you'd-think nutrient levels and still have pretty amazing results. If you really like that UNLS look you can still use Zeospur2 to get the results in a higher nutrient environment.
**I also tried Seachem's phosphate and Stump Remover dosing. The results were not very stable and not as good as keeping more fish and feeding more. But don't add a bunch of fish at once. A few or one at a time, and test your NO3 level after a while.
This ha been my experience as well