May 6, 2012

Corydoras duplicareus @ Day 20

Three more deaths from different hatcheries but none of them has red content in stomach from the red coloring of dry foods. I decided to stop Brine Shrimp feeds (maybe is too potent) just in case as many of them able to take dry foods already.

Day 20 fry with newly hatched
A few looks weak from refusal to eat so i expect few more deaths in the coming days. At the meantime, the adults continue to spawn eggs but not more than 10 each time with many of them infertile.

Swimming Upside Down
Oil Accumulation on the surface is another issue. Interestingly there is one hatchery that do not has. In it, there are frys swimming upside down suckering on the surface which probably explains the lack of it. Not sure the extend of impact to their health. One of the DIY hatchery was then modified to allow surface pass through with the main tank as an experiment. This is fun.

6th May 2012

May 3, 2012

Corydoras duplicareus @ Day 17

Corydoras Frys @ 17 days from Day One - Egg

Finally after a painful number of corrective actions, got to see the stage of free swimming frys eating external foods. Death rates have came down significantly to almost zero. The frys are much stronger and vibrant as well.

To date, i have at least 20 free swimming frys taking both brine shrimps and dry foods from 3 different hatcheries of different batches. About another 20 still taking york sac. And about a dozon left over eggs. Since cutting down on food to the adults, breeding has slowly ceased. This allow me breathing space to concentrate of growing the frys and a cleaner tank water.

During this period i have the hatchery expanded to cater for larger active frys. They are handmade of which the design i am proud of after many trials and errors. Is more fun than keeping the frys alive though the result is the goal.

Hatchery Requirements

- Will not topple
- Prevent foods from slipping through
- Side and under opening to support good ventilation
- Shock absorption internal and external
- Will not escape or eaten through gaps
- Easy to navigate the hatchery
- Easy to observe the frys
- Large enough room to support fry growth
- Cheap and easy to access materials
- Provide shade but avoid dead corner area
- Tank debris not easily stuck onto it

3rd May 2012