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supermansteve32

Trouble breeding CRS

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supermansteve32

Hello again everyone. Just an update and a question. My nursery tank has been working like gang buster and I've got 21 babies and 3 more pregnant females. Thanks everyone for your help. 

My question is what should I change in the 60 gallon to fix my issue with the dying shrimp? The differences in the tanks are Malaysian driftwood, fluval filter, splash bar, atmospheric pressure (because the 60 gallon is 30 inches tall, nursery is 12)

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Grubs
3 hours ago, supermansteve32 said:

My question is what should I change in the 60 gallon to fix my issue with the dying shrimp? The differences in the tanks are Malaysian driftwood, fluval filter, splash bar, atmospheric pressure (because the 60 gallon is 30 inches tall, nursery is 12)

I don't think any of those things should effect the shrimp.    IME identical tanks develop along different trajectories to different stable conditions that will contain a particular biochemistry and micro-flora and fauna.  Sometimes all you need to do is shake things up a bit and send the tank off in a different direction to a new stable state that is hopefully more favourable to the shrimp.  This could be as simple as moving the shrimp to a bucket, draining the water and do a new scape.

If you don't want to bother catching all the shrimp you can still do a lot of moving things around leaving the tank running - e.g. gravel vac the substrate to remove a lot of "mud", take the wood out - sun dry it, then put it back in in a new spot, maybe a new globe in the light if you can (or swap the lights with another tank to change the colour temperature). Redirect the outflow from the filter to flow the water in a new direction. Some new plants.

In other words just change things up... a new start with all the same gear.  Nothing to lose.

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sdlTBfanUK

Fantastic to hear that the nursery tank is working so well so quickly! I would just carry on as it is at the moment as it may all work out given a bit more time and with more shrimps as you put them in from the nursery tank. When I have only a few shrimps they tend to be hiding a lot but when I was 'overstocked' they were much braver.

IF it is possible you could do an experiment of dropping the big tank water level down maybe to half (if easily possible) and see if that makes a difference as obviously then the pressure will be less? If it makes no difference after a month then go back to full water level? Maybe they think it is winter as the pressure is greater in the big tank?????

In the long run though if it continues to be a problem with the big tank there may be an advantage to doing the nursery tank as you can control the numbers better in the big tank that way when you get further down the line and over-run by just transferring a few to the nursery tank to have the babies and knowing that the berried females shrimplets in the big tank won't survive and cause too much of a population explosion - a sort of family planning' for your shrimps........  And you have a backup source of shrimps should there be a disaster in one of the tanks?

REALLY pleased that at least the nursery tank works. I would let the shrimplets get to 1cm before transferring them back to the big tank to give them a fighting chance!

I still tend to think if you just continue as it is given time it may sort itself out on its own, unless it has to do with the pressure then carrying on with the nursery tank will sort that out and has some advantages in number control long term. 

Simon

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supermansteve32

Is there anyone on this site that has had success with crystal reds in a large tank like mine? 

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sdlTBfanUK

I hope someone will reply positively to your question!

Is the nursery tank still working, and how are the adults doing in the big tank?

Simon

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nicpapa

Shrimps when the population is low , they dont like the big tanks.

Sometimes males cant find female when is the time .

What the temp of the big tank and the small one?

Also dont use metal temp probe.

If the shrimp stratum is new it will leach lot of ferts in the water  , its for planted tank.

Move the shrimps to the small tank ,do a big water change, dont use chemicals.

Driftwoods are new?

Sometime if they was in a fish tanks and use chemicals for threat the fish wood absords the chemicals.

 

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supermansteve32

sdlTBfanUK. Yes the nursery tank is working really well. Two moms already delivered full batch, 3 more still pregnant. They've gotten pregnant in the big tank and moved over, males finding females isn't an issue. 

nicpapa. Driftwood is about 1.5 years old and only ever been in this current tank. Temp is consistently 70-74 degrees on both tanks. Stratum is about year and a half old. 

Back in November last year I had over 50 to 60 shrimp in there, then I moved the tank and then it's been declining until I started the nursery tank. 

Thanks everyone

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sdlTBfanUK

Hopefully then if you keep on with the nursery tank, as soon as there are more shrimps in the big tank it may all sort itself out. Really pleased to hear that at least the nursery tank is working well in the meanwhile!

Were they breeding ok before you moved the tank as if they were that would tell us it isn't the water pressure at least? 

Simon

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supermansteve32
6 hours ago, sdlTBfanUK said:

Hopefully then if you keep on with the nursery tank, as soon as there are more shrimps in the big tank it may all sort itself out. Really pleased to hear that at least the nursery tank is working well in the meanwhile!

Were they breeding ok before you moved the tank as if they were that would tell us it isn't the water pressure at least? 

Simon

I believe they were breeding fine before the move. I started out with 10 shrimp and they grew to about 50-60 in number. I never thought the pressure was an issue but I just don't see why the babies aren't surviving in there. 

I mentioned before that after I moved the moms into the nursery tank I noticed 2 babies in the big tank so one of them popped a couple out beforehand. I don't see them anymore, guess they didn't survive. They lasted about 2 weeks. 

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    • sdlTBfanUK
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