Help lps keep melting

[mfama417]

i have a 57 gallon rimless which you can see in my link. Since i set the tank up a couple a months ago I have lost in order a 2 chalices, 2 acans and now my ducan looks to be next along with another chalice and a war coral. All my paramaters seem good and i just have no idea whats going on. all the coral seem to be doing fine and then the next day theres a sort of slim coating on them and when i try to get it off it ends up being the tissue of the coral. The params i tested are as follows all with red sea and double tested to be sure


amm/trite 0
trate .5
alk 10
calc 440-460
mag 1000-1040
salinity 1.025
PH 8.15-8.3 (apex readings through the day)
temp 77.5-78 controlled by apex


this is all i have kits for. I have no idea whats going on. the chalices seem to just recede from the edges in and the acans just melted away. and now the duncan did the same. I have a couple more acans and a torch all doing well now but i dont want the same thing to keep happening. At first I just assumed the few i lost weren't doing well but now it seems to be a pattern. All my sps and zoos are doing really well and growing great. heres a picture of the ducan after i blew it off today and tried to save it.

 

[Reefing Madness]

Mag is way to low, you need it from 1250-1350 at least, some go to 1600. What is your phosphate reading?

 

[mfama417]

Will try and get a phosphate reading tonight going to get my friends Hanna

 

[mfama417]

phosphate reading on a hanna checker is 0 i do run a brs gfo reactor as well as a fuge so i guess its possible but to be sure tomorrow ill bring it to a LFS and test with another brand.

 

[Reefing Madness]

Yea, I figured it couldnt' be all that high if you have SPS in there. Interesting that you can't get the LPS to stabilize. MAG is the only thing I see amiss, but interesting also that your SPS aren't ticked off at it being low.

 

[ReefMadScientist]

Sorry to hear and see!

Yeah I would second the Mag. I thought for sure Phosphate…you may want to double check that again.

The other thing may be lights…could be too bright.

 

[mfama417]

all the corals are very low to the bottom though. i know leds are birght but are they really that sensitive? also the ducan had doubled in size since i bought it in nov and now sudently this happened.