Temporary high phosphates for SPS?

[daniella3d]

It depends, you could have a lack of oxygen from this high temperature, depending on your bioload. You could have RTN due to high temperature depending of you have some bacterias present in your tank that may become more virulent at higher temperature and attack corals.

going from 78 to 81 is quite a bit. How about AC or a chiller?

As for the corals browning, I have about 10ppm of nitrates now and I don't even check my phosphates any longer, yet my corals have beautiful coloration. They do not go brown automatically because a bit of nitrates or phosphates and if they would do it, they would probably return to pastel color when the water return to low nutrient again...

Here is what my corals look like with 10ppm nitrates and .25 phosphates. Not pastel color but surely not dull in color either.

Originally Posted by Reef Pilot

So, will the fish and corals be OK at 81 F or higher? Normal is 78.