deaths was stop everythink was good and now start again, I think I'm doing everything right but I don't why shrimps is dying, my gh : 5, tds: 157, temp: 23 - 24 C, I'm using Ro water now, I have just mangrow, moss ball, moss, alder cone in my tank, I don't know what is wrong with my tank. I feed them every 3 - 4 days, and if there is left food I put out tank, so I don't think there is much ammonia, it's just shrimps and 3 ramshorn in tank. it's can be bacterial infection? but there is not look like something wrpng on them body.
here is my shrimp after death, look like tail is empty
and here is my tank: