Sometimes moving is not an option but figured I'd ask. Had to go back to the first post but what I believe you are saying is:
- Fighting GHA in the refugium with Cheato
- as well as fighting some Dyno in the main tank not much but deff present
So GHA in the refugium (only in the refugium)? Not sure I understand Cheato but if it is a lot then there is one source of nutrient export. How much will vary so may, or may not be, an area. You could remove it to a bucket, airstone, and light if you want to save it or just toss it.
Some form of dino's although you didn't note what type, or if it has been successfully ID'd (microscope?). Low to no nutrients can do this but again not sure what you are dealing with exactly. Still takes me back to all of the things you are dosing for such a young display with 1/4" frags. Algae wants to grow and live and uses similar things that you are feeding the corals to grow.
If you couldn't tell I'm not one to panic (then again it isn't my display to be fair) but prefer a more methodical approach to learn what problem I am dealing with so I can prevent it from happening again. Even after 5 years (also using dry rock as a base 170 lbs of it) I have issues. Question - do you have herbivores and if so numbers? Not too many, not too few, and types.