I'm getting rather frustrated now with my cherry shrimp. I'm using the salty shrimp gh plus and keeping gh at around 7 or 8. That is all I add. Water is very soft so very little kh. Is it this that is causing me problems. The low kh is causing failed molts? I have added some crushed coral to the filter and a small amount of alkaline buffer. Maybe I need to use alkaline buffer when doing water changes?