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JoM

Advice for attempting to raise brackish fry?

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JoM

Or I guess larvae really. 

Hey shrimpers, I have a nano tank that has NQ Algae Shrimp and Darwin Red Nose Shrimp. A few months ago, I noticed three fry. I wasn't doing anything unusual or special in that tank, I just got lucky I think. The three fry survived and are still shrimping around now, they ended up being DRN shrimp. Since then I've seen hundreds and hundreds of larvae, but none have survived beyond that stage since the original three. I recently got Endlers and I move the fry to this tank so I can forget about any kind of shrimp breeding within the tank for the time being. But I'm thinking of getting an external breeding box to move my berried shrimp into once I see eyes in their eggs. Once she drops them I can put her back in the main tank and try to go from there. So, how do I got about this? Obviously I need some marine salt, a hydrometer and a green water culture for food, as well as another grow out tank because I'm not going to leave the larvae in the breeding box.

Have any of you tried this? I can't find a lot of info about salinity levels, how to acclimate them back to fresh water etc. So any advice would be much appreciated. Thanks.

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jayc

Brackish water salinity levels has a huge variation. So no need to be too accurate.

 

An alternative to green water culture is powdered spirulina or chlorella. 

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  • Posts

    • jayc
      It sounds about right for GH6 (6 drops is roughly 120 TDS). Those GH test kits are not the most accurate. And RO water reading of 3 is not unreasonable. I don't know why you would have been reading 240TDS last week and now it's a 100 points lower. I would suggest, not changing water parameter with a water change for a week, then see where it is at. Change if it gets close to 200 (say around 180-190). Let's give the tank some stability by not changing anything for a while.
    • supermansteve32
      I checked my TDS meter and it reads 3 on RO water and today my TDS in my tank is 133. I did a test with API and it took 6 drops so that's around 100 TDS.  I had 2 adolescents die overnight.  Should I only change water when it's over 200 TDS or should i continue with the 10% every week?  Thanks
    • supermansteve32
      I'll check it when I get off work tonight. I'll check my reader against pure RO water & tap, and do a GH test.  I'll also clean my TDS meter.  Thanks for your help everyone. 
    • beanbag
      If u have a GH test kit, then u can do a cross check, where each GH value in RO water made with SS equals about 20 ppm, e.g. GH 6 water will give you about 120 ppm.
    • sdlTBfanUK
      Are you sure the new reading is correct as that sounds unlikely, and I would have thought you would have had shrimps dying  with that sort of decrease. Do you have a second way of checking the TDS, or can you take a sample to a fish shop for them to test? I can't think of any reason that would happen or even heard of that before? Even if you had put pure RO water in last water change it wouldn't have dropped that far! If it is currently the TDS113 it will make adjusting easy as you just mix the water to the desired end TDS figure (140ish) and it will slowly go up to that. Simon
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