RCS dying

[nevets]

I lost a second rcs yesterday. The first dyed the day I bought them and one male dyed yesterday after 3 weeks. I have one big female and a male left with no other live stock. I went to the lfs and got a master test kit and the readings are

Nitrate 0ppm
Nitrite 0-0.5ppm
Gh 75 soft
Kh 0ppm
ph 6.5-6.8
Ammonia 0ppm

I want to buy 3 more but i want to know Was it by chance he dyed or should I be worried about something else. I have a HOB filter with a sponge pre filter bio max balls a carbon/ammonia remover bag half a cuttle bone and another sponge in front of the water outlet oh and my water is at 74.3f

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[tomtom14]

I just think u had a dodgy shrimp or just was unlucky. Can't think of anything else since u have fine water readings.

 

[nevets]

I don't know whats happening to my shrimp the two I have left just hide now and come out when the lights go off. I have it on a timer 6 hours on and 6 off and repeat

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