algae? dino? diatom?

[King Turkey]

experiment I was running I noticed today a instance in with free floating brownish looking slim developed with in 28min after zero water movement wail feeding coral. I will have to get a mico scope from amazon but I was wonder if anyone has ran into this mishap and could ID from the situation I ran into.
Parameters:
nitrate 2
phosphate .02
cal 450
alk 11.5
mag 1350
ph 8.4
temp 78.5
Observation: throughout tank very dark snot like substance started forming from crystal clean water wail feeding corals for a 28 min time frame. after return of pumps the free floating brown substance was swept away and not visible in tank. returning to crystal clean water.
I bacteria dose dr tims run carbon. I dose nitrate to keep it up so that nitrate does not stay at zero. I dose and food just the right amount so that every number is a constant.

Thoughts?
I know what to do and that is stop dr tims and let things just ride out but I was wondering if anyone has done this or ran into this situation. I have zero concerns considering my corals are in great shape with good growth.

 

[lkriley]

Many coral excrete. It was probably just that. Without the current to wash it away it was visible to you. Doubt it it anything to worry about.

 

[moz71]

Agree. When I stop all pumps. Some of my corals excrete floating slim. Amazed on how much they excrete. My best guess

 

[King Turkey]

O rely? Maybee it was from corals. I could have swore it was forming in the still water. Maybee I will have to try this again when I have a microscope and evaluate and study this further. Wonder what it could be