Monti bleaching

[Chitownpw]

My monti colonies are bleaching and I can figure out why. I had two large colonies bleach out about a month ago and now my sunset is starting to bleach. Vid (if it posts) to show general health of tank.

Thoughts?

1.026
8.48 alk
460 cal
1460 mag
0.5 nitrate
8.08 ph https://vimeo.com/168558115


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[Chitownpw]

No insight?


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[75pxatr]

I have experienced bleaching on mine. In my case it was related either to an alk swing or the over use of GFO and carbon dosing(to control algae).

Do you keep a log on your tank? There are more variables than the ones you have listed.
If you are striving to keep a low nutrient tank, many believe that your Alk should be 7-8 dkh.

 

[71xlch]

I always house a red monti in my tank as i find its the first to show stress if ALK is on the move. When it looks faded i know something is up. Never failed me yet.

But looking at your pictures i agree it looks that ALK has moved. For me the sweet spot with ALK is 7-8. Just my 2 cents.