Hmm, so not sure if there's an end game here? Algae scrubber will totally take out all nutrient (and starve the coral), but no dinos. Chaeto won't do anything NO3/PO4 will just fuel dinos anyway since algae growing won't outcompete So should I just save all the trouble and restart the tank? toss all the sand dry out the whole system, clean what I can QT all the animals fw + bleach rock New sand, new water, rock back in for a new cycle to start all over Try to prevent dinos hitch-hiking back in? What would be the best way to prevent dinos hitch hiking back in?