sps doesnt do good in my tank

[nano reefer]

a lot of sps (acro type. i.e. branching style coral) doesnt seem to do too good in my tank they just seem to bleach out and die?

biocube 29 with 12" vho t5s and actinic 36 watt pc
for flow stock return and koralia nano

0 phosphate
0 nitrate
440 calcium
12 dkh

gonna test other stuff soon

 

[kikireef]

Alk is way too high in my opinion. Could be lack of flow too. PC bulbs arent all that good either.

 

[neoalchemist74]

How long does it usually take them to die? are you using a phos removal media and if so what brand and how heavy is the flow through the media?