@bubbaque I agree that dosing was not really indicated for your tank since there was no offending algae or other observable problem with the tank at the time. If anything it sounds like just feeding (even) more would have been a great idea.
Details, Details, Details
PO4 – Depending on your PO4 kit's error rate, .02 ppm PO4 might be near-zero or even actually zero. Either one is not good for the subject at hand.
NO3 – NO3 at zero is a second potential cue for dino's to start changing their behavior in a bad way. Under low-nutrient conditions a spike in NO3 will potentially upset the balance by causing a bloom which uses up all available PO4 from the water....which can provoke the dino's.
Dino's – Apparently dino's are not good at competing for and acquiring PO4, so even at "merely low" PO4-concentrations they can start to starve for PO4.
So while your corals were so far competing in that environment just fine, I would still say overall that the signs, including the dino's, are that you are/were slightly starving the tank.
Certainly there's room to feed more in your system....sometimes that's enough to get PO4 back to where it needs to be, and certainly the animals in the tank will be happier.
But in the short term, if you were to dose any liquid nutrients, I'd have to suggest dosing both NO3 and PO4 up to low, minimum levels until signs of the dino's have completely passed. Something like 5 ppm / 0.05 ppm.
Myself, I think I'd just try to feed more.....perhaps using an auto-feeder with dry foods to feed some while you're away.
Details, Details, Details
PO4 – Depending on your PO4 kit's error rate, .02 ppm PO4 might be near-zero or even actually zero. Either one is not good for the subject at hand.
NO3 – NO3 at zero is a second potential cue for dino's to start changing their behavior in a bad way. Under low-nutrient conditions a spike in NO3 will potentially upset the balance by causing a bloom which uses up all available PO4 from the water....which can provoke the dino's.
Dino's – Apparently dino's are not good at competing for and acquiring PO4, so even at "merely low" PO4-concentrations they can start to starve for PO4.
So while your corals were so far competing in that environment just fine, I would still say overall that the signs, including the dino's, are that you are/were slightly starving the tank.
Certainly there's room to feed more in your system....sometimes that's enough to get PO4 back to where it needs to be, and certainly the animals in the tank will be happier.
But in the short term, if you were to dose any liquid nutrients, I'd have to suggest dosing both NO3 and PO4 up to low, minimum levels until signs of the dino's have completely passed. Something like 5 ppm / 0.05 ppm.
Myself, I think I'd just try to feed more.....perhaps using an auto-feeder with dry foods to feed some while you're away.