Whit spot

[blkhawk10]

I have a peach digitata which has been in my tank for years now and a couple days ago a dime sized white spot appeared in the middle of it. I feared nudis at first cause I have added other montis recently, but can't find anything...any ideas on what could have caused it?

 

[zesty]

picture would help a lot.

Also, post parameters.

Anything changed? Did a piece of salt craap fall on it? Has it changed in size since you posted this?

 

[blkhawk10]

Parameters are

calc: 450
ph: 8.2
nitrate: 0
phosphate: 0
alk: 9.2

As far as I know no salt creep fell on it, but I can't say for sure...the only thing that has changed would've been I up'd my flow and moved it around a little bit...I have a purple haze monti that has not had polyp extension for the past week or so that was growing amazingly fast. I just dipped the purple haze in revive yesterday during my water change to see what would happen and so far nothing.