Shell Dwellers Mysteriously Dying After 5 Years - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 2 Old 08-23-2019, 08:12 AM Thread Starter
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Shell Dwellers Mysteriously Dying After 5 Years

I have an established tank of Multies set up since 2014. I started with 3, they bred and then I had 13 or 14.

Fast forward to 2019, there were no problems since then. I perform a 50 percent water change each week and I have a fine aragonite substrate. My tap water is quite hard and the tank maintains a pH of 8.4.

A few weeks ago I noticed that one of the males had died. I didn't think too much of it and removed him. Then a few days later another male had died. I can't find anything wrong with any of the fish visibly, but I decided to try a treatment of Kanaplex, Metroplex and Prazipro. I did 3 treatments with a water change before each one.

I thought that had solved the problem, but another male died. For the last week I have been dosing the tank with Paraguard daily. It states that no water changes are necessary. It was going well until yesterday I noticed one of the females was attached to the pre-filter sponge. She was close to death, so I used clove oil on her.

I tested the water after finding each dead fish. It's the same every time. 0 ammonia, 0 nitrites, and less than 10 nitrates. Tank water is a solid 80F. I don't know if anyone can help me, but I thought it was worth a shot.
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post #2 of 2 Old 08-26-2019, 04:51 PM
Aragonite substrate wears out over time so it could be a missing mineral they need. You can use a garden hose to suck out a section and replace with new.
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