If you just did a water change before this, the females molted and the male's can smell them. They are having a mating swarm. Cherry shrimps only live 9 months to a year, so it could be normal die off.
Shrimp Hording and dying?
Hey Community,
So I started up a 45G Freshwater tank back in the summer holiday. I let it cycle for 2 months then added some plants. A month after that I added tons of plants. Finally 3 months after the initial setup I finally added 20 Yellow Cherry Shrimp. They started to multiply like crazy and to date I have around 150 in there. The ONLY other fish I have in that tank are 6 otos. Today I noticed that a HUGE chunk of my shrimp are all swarmed together near the front of the tank. They have been like this for the past 12 hours. In addition, Three adults died on me today too as well as 2 infant ones. I did a water test and Ammonia and Nitrite is 0 and Nitrate is less than five. I dont think its a water issue or my otos would have been the first to die. The ONLY other thing I can think of is yesterday I added 4 new Hygrophila Corymbosa (Spelling?) into my tank and a first dose of Flourish Advance (New-ish product from Seachem). Would that cause the shrimp to die? If not, whats causing them to die? Ive attached a pic of the swarming.
So I started up a 45G Freshwater tank back in the summer holiday. I let it cycle for 2 months then added some plants. A month after that I added tons of plants. Finally 3 months after the initial setup I finally added 20 Yellow Cherry Shrimp. They started to multiply like crazy and to date I have around 150 in there. The ONLY other fish I have in that tank are 6 otos. Today I noticed that a HUGE chunk of my shrimp are all swarmed together near the front of the tank. They have been like this for the past 12 hours. In addition, Three adults died on me today too as well as 2 infant ones. I did a water test and Ammonia and Nitrite is 0 and Nitrate is less than five. I dont think its a water issue or my otos would have been the first to die. The ONLY other thing I can think of is yesterday I added 4 new Hygrophila Corymbosa (Spelling?) into my tank and a first dose of Flourish Advance (New-ish product from Seachem). Would that cause the shrimp to die? If not, whats causing them to die? Ive attached a pic of the swarming.
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