Hello everyone, so finally got my first fish in my QT, wanted a clown but they only had babys... anyhow i got a engineer goby and when i got him home i noticed some redness around his gills and maybe pectoral fin... also noticed some white spots on his face but it looks like maybe scars? also a light patch on his dorsal fin... i am very new to this stuff and not sure what i should be looking for is this stuff normal? i took a video donno how good you can see it but here's the link https://youtu.be/Hi42rvHyYHc . also i was going to buy some cupramine at the LFS when i got him and they talked me out of it... they said these guys are very sensitive to copper and if i use i should only use 1/4th of recommended dose. also i dont have RODI water so i use a declorenater like prime or the stuff flual makes and they said i should not use copper couse of that as well.also noticed the redness when he was still in store bag. ammonia nitrite and nitrate are 0 temp around 76....