In the last week I've lost several shrimp. It's making me a bit crazy because I just got 10 from the shrimp farm the other day and I found one of them dead this morning. I'm doing water changes, 10% every day since wed, I lowered the temp to about 74. Water chem has been steady for months. Nitrates 20-30, nitrites 0, gh 75ish, kh 140ish, ph 7.2-7.5. It's HEAVILY planted. No CO2 3 or 4 drops of excel a week and 1ml of flourish complete once or twice a week I have a snail invasion, literally hundreds if not 1k, that came in on some plants, 3 assasins to deal with the invasion. 8 neons and 6 to 12 RCS, cant count them because the tank is full of plants. The 2 older shrimp that died had cracks in the shell on their back. So I tend to over think well everything, but could all of these snails be taking up all the calcium leaving little for the shrimp to molt properly and killing them? I put a small bit of spinach in there for them tonight and they didnt even look at it. Or should I just chill out keep doing the water changes and order more shrimp next month?