Hi guys - A little background...I have a 180g tank with an additional ~100g of water volume in the sump. Per Trident, my alk is 11.5, calcium is 499, and mag is 1455. Temp is 77.5, pH is 8.1, and salinity is 1.026. I run Orpheks for lighting and I also run UV and Surf4 floating algae scrubber. I turned my skimmer off since the Surf4 does it's job very well. I use RO/DI with 0 TDS. I have had a red haddoni since 2019 that has thrived in my tank. Unfortunately, after I introduced a new haddoni from an online vendor earlier this year, it hasn't been the same. The new haddoni never made it and has since been removed from the tank. I have three other haddoni's in my tank, but the red is the only one affected. During the evenings, it has been looking very deflated and just doesn't look healthy; however, during the day it looks just fine. Below are some pics. The first was taken at 6 PM (deflated) and the second pic (looks just fine) was taken at noon on the next day. It detached itself from my sandbed, which is why I put it in the acclimation box. It has gone through two cycles of cipro and that doesn't seem to help. I am not sure what is going on and I am hoping to get some insight from others that may be more experienced. I am worried when it doesn't look good, but then it looks just fine 12 hours later. I am not sure when I am going to try and put it back in the sandbed. I have four tangs (scopas, sailfin, blue hippo, and purple), a clarkii clown pair, yellow wrasse, flame hawk, and an Australian stripey. Anyone have any thoughts?
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