1 Crystal Red Shrimp left

I have been taking care of my prawns tank in the office much more than the tank at home. Sadly, the population of the CRS and Cherry shrimp have both suffered several losses.

I cant recall when... but I gotten my first batch of 5 CRS and they all grew to adult in this tank. However I now left with just 1 of them. I do know that some would definitely die off naturally, but well its rather sad to see just 1 survivor (the 4th one die today)

I noted that my tank is starting to smell. May have to look into this. Anyway, I think I may save my money and invest it in the Cherry shrimps. After all, they cost 1/3 of the price.