chalices receeding in the middle

[aquafrags]

why would some of my chalices be receeding in the middle of the colony?? never seen this before???

I will take some pics tomorrow??

salinity 36.0ppm
calcium 360ppm
po4 0.05 on hanna
alk is @ 9.0 dkh

they are under 250 watt radiums in a 300 gallon tank

 

[inactive]

Happened to one of mine also, burned out from the light. Similar to the tips of an acro being burned when replacing a bulb

Move it into the shade and keep an eye on it.

 

[aquafrags]

that makes sense had them in my 40 gallon and just replaced my bulbs on my t-5 fixture, not happy my oregon mummy eye colonly just got cut into a frag

 

[Blackhawk Fan]

Where's your mag level?

 

[aquafrags]

did not check, but it usually runs around 1300ppm, test tommorow. are chalices sensitive to this level???

 

[Blackhawk Fan]

Chalices are very sensitive to low mag levels and will bleach out. I don't think 1300 is too low, but I like to keep them around 1450.

Definitely something you want to check out.

 

[Ian]

what fish are in with it?

36 PPT is a tad high on the salinity...

 

[Blackhawk Fan]

36 PPT is a tad high on the salinity...

Good catch Ian, I looked right past that and the calcium is a bit low as well.

 

[Alpha Aquaculture]

Also be careful about raising Mag levels too fast, I did this and it had a negative affect. Raise it slow and steady if you do.

 

[Rukis]

If there was a random hole, I found my peppermint shrimp eatin out of the eye after I had fed it, could be something picking at it??

 

[aquafrags]

no random holes, receeding on my bazooka joe, BGM,Oregon mummy eye,pumpkin patch.

the receeding is at the center of the colonies, which I thought was bizarre. the tank they were in only has a small tang. never had any issues and have had him for years.

 

[aquafrags]

new params with elos test kits

ALK 9.0
Cal 350
Mag 1000ppm (not Good)

I guess i will start dosing mag on a regular basis, i thought water changes would keep this level

 

[Blackhawk Fan]

Get your Ca up around 400-435 as well.

 

[aquafrags]

Will make the changes to day, I think the reason my alk and cal are out of line is due to low mag, I have a profilux doser and I stopped dosing mag for some reason:tongue: