Shrimp are sick and dead in an established tank - The Planted Tank Forum
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post #1 of 8 (permalink) Old 10-03-2019, 04:46 PM Thread Starter
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Shrimp are sick and dead in an established tank

Hey,
I have a 60 gal heavily planted tank, which is been running for more than an year. With a growing colony of RCS, neon tetras and a couple of kuhli loaches they all were doing great. As I was busy for last couple of weeks , I couldnt pay much attention to it. Today while carrying out usual maintenance, I couldn't find any RCS in it, which usually roam around everywhere. Upon a close inspection, I could only find one of them, which is sick and not reacting to my hand, usually they run and hide. There were atleast 30 of them, and I am sure that, with plenty of space to hide from neon tetras and kuhli loach ignores my RCS, predation is not an issue. But, had seen an explosion in population of snails, I am aware of calcium imbalance caused by it, but I doubt whether it can kill 30 RCS in a period of 3 weeks. Any guess what happened to RCS and any inputs on what should I do before introducing some more RCS. ?
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post #2 of 8 (permalink) Old 10-03-2019, 05:11 PM
snails are your friend
 
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My first question I ask myself when I lose shrimp is did anything change? The answer is always yes, of course it's just a matter of determining what. A mature established tank that size should be able to be left alone for 2-3 weeks without issue. A snail explosion would indicate overfeeding or something dead in the tank to me. Calcium isn't running low enough to impact shrimp in such a short time and would usually manifest itself in molting issues rather than quick death. I'd say for the time being calcium levels aren't the cause of problems. I'd lean poisoning or overheating, first. Mind giving us a run down of your parameters? GH, KH, TDS in particular if you have them. Do you use tap water?
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Nothing good happens fast in an ecosystem.
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post #3 of 8 (permalink) Old 10-03-2019, 06:40 PM Thread Starter
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Thanks for your quick response. I don't have any test results, but I did a 60 percent water change about a month ago, which I have been doing ever since I set this tank up. I installed a new filter after my old one stopped working, which happend 3 months ago. Yes, the new filter is not great as I expected it to be, water output rate is less than previous one and circulation is bare minimum. Another change is new lights, which has great impact on plants.
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post #4 of 8 (permalink) Old 10-03-2019, 07:32 PM
snails are your friend
 
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I'd consider getting a liquid master test kit. Really helps you get to the bottom of things in cases like this. 60% water changes are a bit extreme for shrimp. These are creatures who can live in conditions very far off from their ideal parameters as long as it gets that way slowly, but can wipe out from a large percentage water change to better parameters. Change needs to happen as slowly as possible. 10% weekly would be much safer than 60% monthly. And it's never a bad idea to add the new water back over time. These days, I've even began to fill my tanks slowly after water changes by siphoning the new water into them with airline tubing.

Nothing good happens fast in an ecosystem.
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post #5 of 8 (permalink) Old 10-04-2019, 03:10 AM Thread Starter
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Yea, I will get a test kit and check whether any parameters went off. Thanks
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post #6 of 8 (permalink) Old 10-04-2019, 04:12 AM
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I honestly wouldn't be surprised if the tetras had a snack...
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post #7 of 8 (permalink) Old 10-04-2019, 05:11 PM Thread Starter
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Yes, neon tetras occasionally snack on them. But, I don't think they can wipe out entire colony of RCS. Moreover, they had plenty of space to hide in the tank.
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post #8 of 8 (permalink) Old 10-05-2019, 12:01 AM
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30 in three weeks is entirely possible.

I've had hundreds of shrimp get wiped out by a handful of Endlers in a matter of a month.


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