Ammonia 0 Nitrite. 0 Nitrate. 15 Kh. 2 Gh. 10 Ph. 7.2 I keep waking up to finding one crs dead. Usually milky white, I observe them eating and going about thier day. I started with 13 and have lost 5. What can be going wrong ? I have had them a 2 months and now this just started happening. I have had 2 successful broods as well I did have a small ammonia spike before this and out of panic for my first broods I used fedbenzole to treat for water hydra. Didn't want to loose my shrimpets to them.. any ideas, I do water changes once a week, I do dose seachem flourish once a week for plants and seachem flourish excel. Also have diy co2 in the tank.