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will shrimp kill each other if hungry enough?

Ok, I'll do as suggested but shrimp have been dying over last 2 months, well before the rescape. One died in the holding tank(54l) whilst other tank was being redone. I started with 11 0r 12 and now have 5 crs left, one went for a walk, rest died in the tank. I had kept the external filter running too so thought with water changes and a mature filter that it would be ok, oh dear.
 
The PH is lower now and stable. There are Capatta leaves and a banana leaf in now too so hopfully will help stop any infection. Gh now 6, tds@153. There is 4 really healthy looking CRS and 1 with really poor white banding so hoping this one can pick up.
 
Don't give up, my colony depleted to just 2 shrimp. I figured out the problem and those 2 went on to produce a colony of over 200 :) Satitsfying when it goes well, but as you are finding its head banging when problems develop! Keep us posted.
 
Well tonight a CRS had cast its shell and was hiding in the Java fern. 4 of the other shrimp were swimming and running around the tank. I'm hoping that this is a sign that the males at least are interested in getting some action;) Either that or I'm going to find everything dead tomorrow:thumbdown:
One more shrimp has died, a CBS that had also lost all of its white pigment.
 
Fingers crossed that things will settle down now then. If the males are doing the mating dance, I wouldn't mind betting that the one that's moulted and hiding is a saddled female. Could be berried in the morning for you! :)
 
Sometimes you can see a dark triangular shaped patch / shoulder immediately behind the head if she's saddled. Depends on how solid white your shrimp are of course. Good luck!
 
Nope, no saddled female this morn:( The shrimp that are healthy are too white to see anything. One that died that had lost its pigment was saddled. All shrimp left have good pigment bar one that I think is male.
 
Just my two cents but I find as with fish the weaker is always disposed of some way or another if it brings threat to the group.
I was told that shrimps do release a pheremone which can intoxicate other shrimp. But I have no scientific backing to this.

With me and all my shrimps I keep them in 60-100l tanks and every so often offload a bunch to ensure that the bloodline is changed every season.

Never used the leaves before and use bog standard substrate with no problems. Bred high grade shrimps from a group of 6 to a few hundred.

Nowadays you have more specialised soils and access to RO more easier which can mimic their parameters which makes acclimaitsation much more easier.
 
Ive always lost shrimp over the course of a month if I put 20 in they will slowly die. ive added a poly filter for a few days and pulled it yesterday to find its blue/green indicating ionic copper. I have never used bunched plants and always bought tropica from the green machine. Iam putting it down to a white spot medication I used about 8 months ago (before I kept shrimp) left copper in the tank. just added 4 cherries to hopefully they will be ok.

ant
 
May have found the source of the problem. I got some calibration fluid for the tds meter, just to check, and it is showing 20ppm over the true reading. So I thought I'd raised my tds to 150 and really it is 130 so will add 2ml of the mosura plus daily until it is at 150.
 
Just to chuck my ten penneth (sp?) into the mix. I have had amano shrimp chase and eat other amanos in a 200 ltr tank. The eaten shrimp may have been ill but did not show any ill effects prior to becoming the main course for their tank mates. Mlgt may have a point about the pheremones ?
 
This morn I had a berried CRS! A couple of hrs later when the lights were on I went for another look and she'd dropped all of the eggs. Was totaly gutted. I didn't realise they would do this, maybe there was something wrong with the eggs? Gutted, gutted, gutted.....

Not going to raise the TDS anymore as taking this as a sign it is at a suitable level. Just wondering if the eggs were inferior because the shrimp have been deprived of a suitable level of minerals for a while?
 
Ok, feeling very stupid now. I've got 2 shrimp that look very similar so I must have been counting them as the same one as I've 1 more shrimp than I thought, and she IS berried:thumbup: . She is keeping a very low profile while the lights are on but I managed to get a couple of pics in the 60sec she was out just so I know I've not cracked.
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Hurrah!!!!!(Thanks Basil)
 
Now you just gotta love a happy ending like this!! Very pleased for you, it's most satisfying when you get a berried shrimp......especially a nice CRS like that! Looks like a good SS grade mum. Now you have about 4-5 weeks to get ready for shrimplets. If you can live with it in your tank, try to keep a small patch of brown algae growing on the glass. Even if its just 10x10cm. Baby shrimp love this stuff and it helps them get through the first week.

Well done again! :)
 
Thanks basil:happy: I don't really get much of anything growing on the glass but I never clean the back of the tank. I have some small lava rock with round pelia and have just tied 2 meshes with more round pelia so I'll put those in. There is quite alot of leaf litter now and I'll add more in a couple of weeks so its nice and slimey for any shrimplets. Thanks for all your advice. I'm not going to celebrate too much until a few weeks has passed and all is still well. 4-5 weeks? That feels like forever:eek: !
 
Yeah, get the pelia in there....a cracking plant for shrimp. I had a plant the size of a football in one of my tanks, until wife thinned it out for eBay!! Lol
 
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