My fish almost died

[Daoz126]

I have a 125 gallon 5 damsels one trigger and a clown fish I bought a banded coral shrimp and a sleeper goby I acclimated them went to the gym came back 2 hrs later everything was fine went to the movies after was gone approximately 4 hrs all my fish were swimming disoriented and slow or were laying on there side hardly moving and my trigger and one of the damsels were looking discolored like dull my banded coral shrimp was doing fine the goby was no where to be found so I thought maybe one of the fish i bought was sick I was only able to grab the clown fish and trigger and put them on a bucket I had ready for when water evaporates my clown fish immediately started swimming back to normal the trigger not so much was barely moving so I kept trying to push him around for him to keep swimming. I dropped some prime from seachem then I did a water test prolly should of done the water test first not sure if it would of any effect but test look good after like 45 min fish started to swim back to normal and ended up putting the trigger and clown back into the tank and as soon I dropped the trigger started swimming again. I kept the banded coral shrimp out because he was attacking one of the damsels that was laying on the side so I'm not sure if maybe they were all stress because of the shrimp was kinda aggressive but then also I noticed my water lvls on my wet dry was kinda low and was blowing nothing but bubbles into the tank so I'm not sure if that effects the oxygen lvls or maybe with the new shrimp and goby my oxygen lvls went down and I'm not really sure symptoms of low oxygen lvls after a hr tank seem to be back to normal without the shrimp and slowly getting their color back. I have 4 530 gph power heads a 13w uv sterilizer a hang on cascade filter and wet dry with the overflow. Forgot my to say my goby came out and was the only one seem to be doing fine besides the shrimp need help on what to check or ideas what could of gone wrong I'm scared to come home or wake up and my fish are all dead

 

[Tuan’s Reef]

Welcome to R2R

Really hard to follow your thoughts without punctuation. Looks like just 1 long run on sentence.

How old is your tank?
Current water parameters ?
Did you cycle your tank?

 

[Bmw015]

How did you acclimate? Do you have an ato? Tank parameters? Tank age?

 

[Daoz126]

How did you acclimate? Do you have an ato? Tank parameters? Tank age?

Tank is about 3 months old had it cycled with 100 pounds of live sand for a week before I put in 5 damsels then a week later I got a trigger fish and everything was fine. As far as acclimating I do the drip process usually for about 30 min. just yesterday I bought the shrimp and goby everything looks back to normal this morning plus I added a air stone. Salinity. 023 ammonia none detectable ph 8.2 nitrite non detectable nitrate 5

 

[vetteguy53081]

I would verify your readings with a sample to pet store and also the salinity. What filtration do you have and what is tank temps which Will affect oxygen levels.