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My yellow golden shrimp turns blueish and I immediately have it in quarantine. What is wrong with it? I also found other shrimps have something white ish on their nose/front legs that are in the same tank. I think it’s infected the whole tank including my shrimplets. Can anyone help me identify this cause? There were 5-6 dead’s in the past few days, this morning I found 3 new tangerine tigers dead and 1 orange dead but don’t know when they were died. ?

A great half hour video if you are a killie fish enthusiast!
https://www.youtube.com/watch?v=XA8sUkC-ReA
Simon

Hey Guys, I'm hoping someone will be able to help me out. I am a first-time shrimp owner. Four days ago I came home to find that one of my poor ghost shrimp ladies has this weird blue/white moldy looking coloration on her head, primarily on her rostum. She is otherwise still moving around, eating normally, and not hiding. I've done some internet sleuthing (I was leaning towards possible vorticella or bacterial infection), but haven't yet found anything that fits the description and was hoping someone may have run into this before.
Link to pictures
Tank:
- 5 gallon, long. Fully cycled, 2.5 months old
- Houses 4 ghost shrimp (all female), 1 betta, and approx 9 baby shrimp in a breeding net.
- Filter (sponge) + Heater.
Shrimp have been in the tank with no problem for about a month
Water Params (as of November 8, 2020)
- PH 8.2
- Amm: 0-0.25
- NI: 0
- NA: 5 ppm
- Temp: 78

Treatment so far:
Day 1: 50% WC, and dosed 6ml of 3% hydrogen peroxide (with filter removed).
Day 2: Did the same hydrogen treatment, with no change in the shrimp.
Day 3: Removed all of the plants from tank and dosed 4.5tbsp aquarium salt, with plans to do a PWC later in the week to slowly phase out the salt.
Day 4: 60 second salt dip (ratio of 1tbsp/cup) for all my shrimp and the above hydrogen peroxide treatment. I fear that whatever the white-ness is has spread to at least one other shrimp due to a noticeable color change in her legs and pleopods
Anyone have any idea what this is? I'm not sure if I should quarantine the sick shrimp or just treat the whole tank at this point, as I'm not sure if it's contagious.
Thank you in advance!

When I fed my shrimps on saturday I counted 80 and yesterday all appeared well also.
This morning all I can see is dead bodies with a reddish colour shell to the head area.............. I assume it is rust but am not certain, only going by what I have read here.

From what I have read here it could be because the substrate was exhausted and the PH had risen to 7.5 last time I checked (though that was slowly over time)?
I doubt there is much I can do at this stage, but I will set up the old 15L to put any ALIVE healthy looking shrimp in IF THERE ARE ANY! and close down the big tank and start again. I guess I know next time that when the PH indicates that the substrate isn't working properly to act quicker???? When does the learning finish!
My main queries at this stage are:
1) Is it safe to put stuff from this tank with the dead shrimps into the small tank where I will put any healthy shrimps (If there are any alive that is) or will that be a bad idea, I am thinking, water, heater, maybe a plant or 2 etc.
2) How do I make the bad tank good now so that it won't be contaminated for the restart? Tank, filter, heater, plants, decorations etc. I will use new substrate.
Simon
 

Hi!
I found today the smallest of my 6 shrimp dead and can't figure out why and am hoping for help. They seemed generally less active in the last week or two, and I have noticed that they fan their belly flaps quite a lot (though none of my shrimp are berried, at least I am pretty sure, the eggs always seem pretty obvious on photos). Is it maybe too little oxygen? 
The dead shrimp appears completely normal to me, and I found it lying on its side in the middle of the tank, still flapping it's belly fins. I put it in a glass with tank water where aber about 15minutes it stopped moving completely, even if prodded. 
It shouldn't be a shedding issue, as I think this shrimp has shed about 4 days ago. It's the smallest of the 6 (almost half the size of my biggest) so I figured it must be juvenile and it shouldn't be age.
I do have some worms in there that I can't seem to get rid of, but I'm quite sure none of them are planaria. Seems to be some sort of white flat worm that usually sticks to the glass and very thin hair like ones that float around. 
All my cherry shrimp are solid red, so I can't see if they have bacterial infection. There always seems to be one of two that are paler/mottled but as they shed I think it's that? I have a hard time keeping them apart tbh
I did a 50% water change and removed most of the floating plants in case there wasn't enough aeration.
My goal with making this post is to maybe find out what might have killed it/how to avoid further deaths. I'm happy for any advice!
 
Background/setup: 
This is my first aquarium, just as a disclaimer, so I'm gonna list...everything, not that I oversaw sth stupid.
I got 6 cherry shrimp and 5 MTS(that have made about two dozen babies by now) approx. 5 weeks ago. The tank had been set up and running w/ plants and filter 4 weeks before that.
It's ~25L, running a sponge filter with air pump, have some java fern and moss, wood, flourite black sand, and dwarf grass(?) and a lot of tiny floating plants on top. The light sold with the aquarium (very bright) and a desk lamp (less bright) that I use sporadically.
They get fed JBL 'Nano Prawn' pellets (which they don't seem to be fond of) and sometimes blanched spinach/peas/lettuce (which they will fight eachother for). Would they starve themselves for not getting the beloved spinach&peas???
Measured half an hour ago upon finding the dead shrimp:
PH: 7.2  
Ammonia: 0
Nitrite: 0
Nitrate: ~5 (now probably 2.5 as I just did a 50% water change)
Temp: 22-24C
I do use dechlorinator (tetra tap safe).
I currently don't have a gh/kh test but it's on the shopping list. They have a small piece (2x2cm) of cuttle bone permanently floating around the tank, as Glasgow water is supposedly soft and between snails and shrimp i figured they'd need it.
It has been stable like this for at least 3 weeks now, before that, week 1-2 of having the shrimp, the ph was a little lower and small amounts of ammonia/nitrite.
From what I read this should all be fine?