Sps touched.. then few day later rtn

[mos90]

in the last 4 days i have had 2 different sets of sps corals touch each other with bad results. the first was a Pocillopora damicornis that touched my huge monti undata. within a day of touching the pocillopora started to rtn and was gone by the end of the day. the same seemed to happen when a hawkins blue touched a unknown type of monti and the hawkins blue won. had to frag the monti and not sure i can save it.

is this common or is there something else wrong? all other corals look good.

 

[Voodoo Corals]

common. without tank info i am going to assume the contact had those affects.

 

[mos90]

water parameters are perfect. 300g 50 gal w/c every other week. i/o rc .2 times a day feeding. 30 fish

sg 1.025
ph 8.2
no3 - 0
po4 - .01
alk - 7.8
mag 1250
cal 400

 

[mos90]

temp -77-78

 

[markalot]

Increase Mg above 1300? No idea if that's it but I have a poci and a monti that have been fighting for months and no death other than where they touch.

 

[Arkayology]

I lost colonies of green slimer and miyagi tort after they touched and started fighting. It happens.

 

[mos90]

Increase Mg above 1300? No idea if that's it but I have a poci and a monti that have been fighting for months and no death other than where they touch.

i have had that result with a monti and stag.

i fragged up a monster undata last night. he was at least 10" around.

i am raising mag some. slowly