I have 33g planted tank. Been running since March. Added 12 amano shrimp maybe in April ? don't remember but the tank was cycled. Lost one right away but he was really small and I probably did not do a proper acclimatation. Now, I have had 3 deaths in a couple of days. So now I am down to 8 shrimp theoretically since I can never find them all.
Now all my shrimp sleep and eat and stay in this one corner of the tank instead of being all over the place or hidden in my driftwood. Just like this, there is no particular reason that they should be there. Apart from the fact that its the furthest away from the scene of my two probable murderers:
Here are my probable causes:
1. These rocks might be slowly releasing copper in the tank and it has just now attained a somewhat toxic level for the shrimp ?
2. I unrooted some crypts and replanted not very long ago. I have Flourite only has my substrat. I was careful and I did not see any changes in water parameters ( no nitrites ). Now, is it possible some copper was released??
Course of action:
Water change 40 % for now. As I doubt its the rocks and most likely something in the gravel...
What do you guys think ?
What about starvation ? I have a tiny bit of algae on my driftwood. But at the same time I gave them blanched zucchini a couple of times and I always make sure a pinch of the vegetarian meal my fish get falls to the ground.
Thanks in advance!