White center monti

[Gahamilton]

My red plating monti has started showing a white ish center, I have 2 frags of it on opposite sides of tank both show the same thing. I did just increase the flow of the tank because i felt thier was not enough. It is a Sepora 48x24x12 frag tank water volume of 60 gallons. I had a turn over rat before at 800gph now it is about 1300gph. I would assume this would be the cause, should I be worried? Take the flow back down?

 

[dball711]

I don't think that's a flow issue, looks more like lighting or nutrients...what are your parameters?

 

[jcook54]

I've seen it where detritus would settle in the center of montis and slowly kill the polyps. When it grows like a cup (bowl?) the flow will be eliminated from the lowest point and detritus covers the coral. Have you noticed any detritus settling there? Blown any detritus off with a powerhead?

 

[Gahamilton]

will test perimeters again today but 6 days ago it was
Calcium was 410
Magnesium 1260
Alk was 10.5
No has been settling their
I did just also add a bubler to the sump that takes air from the attic that has good ventilation to get lower co2 are pumped into the tank vs a 300sq bedroom air.
And replaced old heater.
I know that is a lot of changes
all other corals look happy other the monti cap. The free monti digita is doing just fine as of now

 

[dball711]

ALK is a bit high, hour about nutrients? (Nitrate, Phosphate)

 

[Gahamilton]

Nitrates and phosphate show as low, all I have is some color indication test strips so who knows how accurate they are

 

[Gahamilton]

Update it slowly resolved and returned to normal color. last night I was spot feeding all my corals with seachem reefe zooplankton and this morning noticed it again just much worse, it had sort of a biofilm/mucus layer on top. I think it is safe to assume that it is cause by spot feeding it so I will refrain from doing that. Anyone have any input?