Why did my shrimp die?

[flopperfrog]

yesterday i purchased 2 more shrimp, and one of them had died this afternoon
yes i acclimated them
it doesnf appear to have any bodily damage and i have other shrimp that are doing well so i’m confused on what killed it?
here’s a pic:
perhaps this something to do with it- when i woke up many shrimp were scurrying all over the place and they still are just a little less

 

[wateriswet]

How do you acclimate your shrimp? Could you fill out the emergency template? That will give us more information so we can give you a better answer

Sorry about your shrimp!

 

[flopperfrog]

Tank
What is the water volume of the tank? 20 gallons
How long has the tank been running? about 4 1/2 months
Does it have a filter? yes
Does it have a heater? yes
What is the water temperature? 75 fahrenheit
What is the entire stocking of this tank? (Please list all fish and inverts.) bladder snails, 7 red cherry shrimp and a bunch of babies

Maintenance
How often do you change the water? about once a week
How much of the water do you change? ~15-25%
What do you use to treat your water? flourish excels (a cap every like 5 days or so), tetra aqua safe water conditioner
Do you vacuum the substrate or just the water? just water

*Parameters - Very Important
Did you cycle your tank before adding fish? yes
What do you use to test the water? api master test kit
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia: 0
Nitrite: 0
Nitrate: 20-25
pH: 7.3

Feeding
How often do you feed your fish? once a day
How much do you feed your fish? about 2 dashes
What brand of food do you feed your fish? hikari shrimp cuisine, occasionally a boiled spinach leaf
Do you feed frozen or freeze-dried foods? no

Illness & Symptoms
How long have you had this fish? got 2 new shrimp yesterday
How long ago did you first notice these symptoms? one died today
In a few words, can you explain the symptoms? dead
Have you started any treatment for the illness? no
Was your fish physically ill or injured upon purchase? no
How has its behavior and appearance changed, if at all? no

Explain your emergency situation in detail. (Please give a clear explanation of what is going on, include details from the beginning of the illness leading up to now)
i bought 2 new shrimp yesterday bc i felt my shrimp were on the clearer side and i just wanted more color variety- drip acclimated them for about 30 minutes and poured them in
the next day my filter isn’t working properly so i fix that (it wasn’t dried out thankfully)
all of the shrimp are going crazy circling around the tank up down right left and near the surface too- but none are dead. the 2 i bought are not circling around
it’s evening and i check on my tank- one of the new ones i bought are dead, right in front of the tank- looks like it just frozen between the rocks and plant roots from my asian water fern, no bodily damage

 

[flopperfrog]

btw this is what i mean by going crazy and circling around: these pics were all taken in a row

a

How do you acclimate your shrimp? Could you fill out the emergency template? That will give us more information so we can give you a better answer

Sorry about your shrimp!

another one has passed and they’re swimming everywhere as if they want to get out
the food i feed says it has copper for their circulation system, could it be possible that the food isn’t getting eaten and there’s copper in the water???

 

[flopperfrog]

How do you acclimate your shrimp? Could you fill out the emergency template? That will give us more information so we can give you a better answer

Sorry about your shrimp!

im going to do a 40% water change, hopefully that'll improve the situation. another one has passed, again no bodily damage. seems as if it just died suddenly. not only that but it had eggs

 

[richiep]

Drip acclamation for 30 minutes is not good enough it needs to be 2hrs
Precise measurements must be done with Flourish excel again 1 cap a week can be damaging shrimp can't take it.
Drastic water changes again will not improve your situation they should only be done with certain diseases and then very slowly
All chemicals overdosed will kill shrimp