ID Acro Issue, white bottom

[kuansreef]

I have a couple of acros and milles which has white bottom as shown in pic. I can't figure out the issue. I have a calcium reactor and chiller with high flow under radion pro. I test alk almost every day, no alk swing remaining at 9DKH. I have my tank for over 1 year. As seen, all acro polyps are open and happy. anyone knows what causes this? thanks!

Tem. 78-79
Alk. 9dkh
cal. 450
mag. 1400
1 mp40 and 2 mp10s in 60g
a cup of carbon in sock
a cup of GFO in reactor
dose Vodka 1ml per day
10g water change per week in 120g total water

 

[kuansreef]

I actually saw a small crab hiding in that area. Should I take the crab out?

 

[Eckolancer]

I actually saw a small crab hiding in that area. Should I take the crab out?

If you dont know what type of crab it is yes. It could be an acro eating crab.


Sent from inside the shark tank!

 

[kuansreef]

Thanks! The white areas are all dean cut. I think it ate them. I can't figure how a happy acro looses tissue like that.

 

[Chameleon]

Its not STN is it?