I have 5 MarinePure cubes a filter sock full of the MarinePure gems in my DT sump. I pulled about 10 (I think) of those gems and added them to my QT to seed it before I added the corals and also have the one rock from my DT. It actually looks like the Vibrant is working for me (on week 2 currently). I upped my dosage this week to twice a week and will continue to do so until things are under control. I dose phyto daily which seems to be helping as well.Vibrant took me 16 weeks to remove 99% of the algae.
You need a large filter system to run NPS or nutrient level will continually increase.
IMM, I would significantly increase surface area by adding several marine pure blocks preseeded with Microbacter 7 so you can mop up that excess nutrient and keep it in check.
To keep population of BB high, maybe consider dosing Nopox and ensure a great skim.....
I check my parameters each time before I dose the Vibrant and so far, all has been well; 0 Ammonia, 5ish ppm nitrates, 0 phosphates, which I can't seem to get up no matter what I do.
I have been tracking my progress with Vibrant, but I have been meaning to start a dedicated thread for it and haven't yet, which is why I haven't posted any updates.
Bad on me! I'll try to get something up today if I can find the time.