Need Help!

So a little tank background before I get into it, I apologize in advance for the lengthy post!


58 gallon oceanic display, 40 B sump/fuge downstairs. Running carbon and a Reef Octopus nwb-150 skimmer


Params are as follows: Nitrate 0, Nitrite 0, Ammonia 0, Ph 8.1, Kh 6.5, Ca 420 and salinity at 1.024


Cycle ended November 22nd, all fall fest coral previously in quarantine went into the DT on the 23rd and were doing well. 1 firefish went in on the 28th, and all coral were displaying excellent extension. Here is where I believe things went awry, I repeatedly rinsed and added 15 pounds of Caribsea Geo-Marine Cushed Coral to the sump for extra filtration and copepod safe haven. No immediate effects, but a day or two later hammers were shrunken and sps extension were non-existant. Next to go bad were softies, shrunken and droopy. also have not seen any signs of copepods since caribsea sand went in.


Black friday fish shipment came in from Bluezoo mid-crisis, tomini tang, starry blenny, watchman goby, pistol and fire shrimp along with a large plate coral whose polyps have only made an appearance once for several minutes after a feeding. At this point all pricey corals went back into quarantine, only to worsen their condition, both hammer's polyps appeared to be melded together and droopy. Pistol shrimp died and fire shrimp molted.


I finally connected all of this to the added crushed coral and removed it, followed by a 20 gallon water change. A day later softies are open for the first time since ad doing well, however SPS and LPS remain closed with the exception of one millepora branch extending sporadically for short periods of time.


Oddly enough my two acan colonies are the only corals to appear unphased throughout the entire disaster. Can anyone provide any insight as to what may have happened or what I should try to do?? Planning on doing another large water change when Red Sea salt shipment gets in. All input appreciated!