Euphyllia's disease

[aquapro59]

Hi!
I'm actually losing all my euphylia's colonies and i don't understand the problem. I've tried all soft treatment / measure to save frogspawns. Problems started with a new euphyllia glabrescens colony last December which necrosed after few weeks. Then all my euphyllia have seemed to be infected. Same problems started on Euphyllia paradivisa / divisa / paraancora. It seems to avoid Euphyllia ancora. I was thinking about jelly brown but it doesn't look like it [even if it could turn to a jelly brown when Euphyllia is very infected ].
I will try to describe the phenomen. First the mouth of one branch start to gape and i can see the skeleton and some white ball of tissues throught the mouth. Infected head dies 2 days after - most of the time, tissues have been eaten by Lysmata during the night....
Here are some pics that describe the phenomen.

Parameters :
D: 1025
T°C : 25
Kh: 8
Ca : 450ppm
Mg: 1350ppm
No3: 0.5ppm
Po4: 0.03ppm

Any way to save frogspawn colonies ?

Sorry for my bad english ...

 

[aquapro59]

No3 : 5ppm (sorry)

I've also been under No3/Po4 X (in fact a DIY version using ethanol / acetic acid / glucose). Not sure but this treatment could probably increase the bad bacteria and probably affect the development of these bacteria in frogspawn ! possible or not ?

 

[tektite]

LPS like nutrients in the water, NO3 is good but PO4 is very low for them.

Have you tried directly feeding them to see if that helps?

Are you sure the Lysmata shrimp are only going after them after they start looking bad? There are many cases where those shrimp have eaten perfectly healthy euphyllia.

When a coral starts showing symptoms, have you tried dipping it in anything to see if that helps? CoralRx, Revive, Bayer?

 

[aquapro59]

hi tektite
Thanks for your reply. Yes i'm sure Lysmata eat only infected heads. I've tried only freshwater and iodine added in the bath. Damaged euphyllia sit in a poor stirring area. Could it be an oxygen lack due to the size of mother plant ? Maybe a sort of suffocation ? Specimen fixed in a more stirring area seem to be in a better shape.
I know that frogspawns love a water rich in organic matter but i've also colorful sps... think they won't appreciate !
I usually feed with cyclopeez