Which corals came into contact with it?
Any LPS by chance?

yep..some rice bubble
i have noticed that my hammer coral is very aggressive around anything else in the area..almost like it is reaching out to touch them.
Can hammer coral hurt zoos by touching them?
thanks
Neal

Sounds to me like it has been stung then as previously mentioned. Keep an eye on the white patchs. Make sure they get good water flow and if they do not get larger don't worry about it. They will heal. If it starts to rapidly lose more tissue then frag the begeesus out of it. :wink:

IMO, the first (and easiest) things to check are: temp not too high (78-80 is ok-lights on-), salinity around 0.025 (borrow a refractometer), and good water flow. What and how much do you feed? Lights? Nitrate, nitrite, amm., PO4,... Test test test. If any results don't seem right, borrow a different test kit to verify. If a babysitter can save a coral, it is mucho worth it too.

Also, what kind of top off water are you using? tap? distilled? RO? RODI?

re SPS
 

actually, i don't think that it has ever really recovered from the move here from Claresholm where i picked up the tank and the corals.
The temp is around 82 right now cuz i turned it up to help get rid of ick on my Regal Tang. But the previous owners had their tank at 82 all the time as well..so i dunno
the other one is doing great
i have like 2000 gallons per hour flow in a 90 tank...lots of movement and i have 2 400 MH and 2 110 w VHO Act
the parameters are all fine
I use tap water that i treat with prime.
Everything else is the tank is doing great
So i don't know
Neal

tank
 

hope you did not crank that heater up fast and are doing it slow.
heat them up to fast and your asking for trouble.
and look at getting an ro unit! or buy bottled water.

salinity should be around 1.025 to 1.026

Definately get away from treated tap water. RO or RODI unit is cheapest in the long run, you can buy distilled from the grocery store until then.