hi there i was hoping that theres someone here who could tell me why my shrimp are dying and if it could be the excel i'm using? i did a water change yesterday and when i got home today there are three dead. my betta could be the culprit but he generally ignores them. i'll be doing a water change now to try fix the problem as i dont want to lose all of them, they incredibly rare here. is there anything else i could do?