So I bought 5 ghost shrimp and put them in my 10g fish tank with my 3 danios and common pleco. I gave them 2 sideways baskets used for holding plants to hide in. They lasted about 3 days and then one disappeared. I couldn't find him anywhere. Then a few days later another one died and then the rest died and disapeared after that. I waited a week and then got a peice of drift wood and 5 more ghost shrimp. The lady told me that the pleco ate some and the rest probably died from stress. She said my water parameters were fine. So I brought my 5 new shrimp home and got them all situated in the tank and all was good. The next day, one shrimp was dead, and another missing and now today the other 3 are dead too. Also, they've turned pink. The drift wood had lots of holes, nookes, and crannies to hide in so I don't think it was the pleco. So I took another water sample in and she said the only thing wrong was the water was pretty acidic. I do 50% water changes once a week and get my water tested once a week as well. They have always told me my water parameters were fine and that the shrimp should be okay (other than the hiding spots and the acidic water from today). I bought tetra pH balance ( I think it's actually called easy balance) and put that in the tank. All in all, I'm not really sure what's happening and what I'm doing wrong. Any advise?