Breeding Journal, Species: Premnas biaculeatus

General
Species:  Premnas biaculeatus 
Social Structure:  pair
Size of Individuals:  Female - 6" male 4" 
Age of Individuals:  unknown
Date added to Tank:  6/2010

Broodstock Tank Details
Size of Tank:  20g high
Substrate Details:  none
Filtration Details:  LR / Refugium
Water Changes:  2x weekly
Water Temperature:  83 degrees
Lighting:  T5HO
Lighting Cycle: 16 hours 
Other Tank Inhabitants: none 

Broodstock Feeding Details
Food Types:  Variety - Flake, Pellets, Frozen, Cylopeeze, Home made mixture
Feeding Schedule:  2 x daily

Spawning Details
Date of First Spawn:  7/10
Spawn Time of Day:  11 PM
Dates of Consecutive Spawns: Every 9 days       
Courtship Details: 
Egg Size:  slightly smaller then 1 mm x .5 mm
Egg Color:  Orange
Egg Count:  600 - 900

Hatch Details
Hatch Date:  4 - 5 days after spawn
Hatch Time of Day:  11 PM
# Days after Spawn:  4 
Larvae Description:  active 


Larval Tank Details
Temperature:  80 degrees
Size of Larval Tank:  10g standard
Substrate Details:  none
Other Tank Decor:  none
Filtration Details:  sponge filter
Lighting:  fluorescent
Lighting Cycle:  24 / 7 first 5 days
Water Changes:  daily after day 3

Larval Feeding Details
Food Types:  Rotifers, otohime A and B
Feeding Schedule:  Rotifers for 7 days then ween to otohime

Metamorphosis/Settlement
Date of Settlement Start: 
Days after Hatch: 
Date of Settlement End: 
Description of Fry: 

Grow-Out Tank Details
Temperature: 
Size of Grow-Out Tank: 
Substrate Details: 
Other Tank Decor: 
Filtration Details: 
Lighting: 
Lighting Cycle: 
Water Changes: 
Size at Transfer: 
Age at Transfer: 

Grow-Out Feeding Details
Food Types: 
Feeding Schedule: 

Additional Information
Miscellaneous Information: 



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Photo taken this morning of most recent spawn 10/10/2010
 
Ready to hatch!
 

They really only take 4 days to hatch?!

4 days is all it takes... I have to watch the temps because if I let it get warmer they will start hatching on night 3. 
 
For the first couple of hatches I thought they where being eaten as I was expecting a 7 day period at least.  Turns out I was missing the hatch each time. 

I should note that I am not counting the spawn date - someone let me know if I should.  With the spawn date counted it is 5 days.

Had a hatch last night and lost them within hours.  I don't know what went wrong.  No ammonia present in the water.  
 
I had just transferred the larvae and tinted the water and fed rotifers.  Lights where over half the tank.    Transferred larvae from broodstock tank at 83 degrees... temps dropped to 81 in the larvae tank. 

Did you get them to Spawn again?

Chad Penney - MBI Council
Agis quod Adis