Friday, 1 May 2015

Raising Corydoras Napoensis fry

My Corydoras Napoensis spawn on an almost weekly basis (Ph 7.0, 23-24c) which started on the change from winter to spring, assuming the change in atmospheric pressure is what has encouraged this spawning. I have decided to start a log with different things I have tried and mistakes I have made in raising the fry, as I have yet to get any past 6 weeks. 

Firstly, I'll start from what I do with the eggs. The eggs are removed from the parents tank and put into a plastic tub with an airstone and a bit of Anti-fungus. In fertile eggs are removed. The eggs hatch in approximately 3 days. Once hatched the fry are left to consume their yolk sacks and first food is given after this. On the first few attempts I tried to feed decapsulated brine shrimp eggs straight away, this proved unsuccessful and most fry were lost within a week. Another error I have made is water changes using tap water. This appeared to kill all fry of within a day. Using tank water from the parents tank appears to be a must with what appears to be a sensitive species. Learning from these mistakes the next batch were fed after three days or so from hatching with a squeeze of filter media. Daily water changes were carried out using water from the parent tank. This was continued for a week until the fry were of a size micro worms could be consumed. I have also been using Java Moss as a source of food and hiding.   Missing a days water change seems to be an issue and unlike the Bronze Corys (Corydoras Aeneus), they fry don't seem to respond well to decapsulated brine shrimp eggs in there diet. 

This is as far I have gotten so far. I have lost all fry by 6 weeks after looking promising until this point, for reasons which I can only guess. Anyhow, I shall keep trying!


An update of current species.

Here is a list of catfish species that I am currently keeping. Getting close to a point I can't add any more fish before I add more tanks. Species in bold are breeding groups. My Concolors are quickly developing into a size in which I can attempt to spawn them. I plan these to be my next breeding project.

C.Aeneus Albino

Aspidoras Paucirodiatus

LDA010a Rineloricaria
Sturisoma Aureum
Ancistrus Sp.
Ancistrus Sp. Rio Ucayali

Wednesday, 13 August 2014

Corydoras Napoensis spawn (Cory spawn 3)

Corydoras Napoensis                                                                               Spawn date: 26/06/2014
 Number of males: 2
Size: 1.5"
Age: Unknown (purchased June 2013)
Source: Maidenhead Aquatics. Unknown if wild or captive bred.
Number of females: 1
Size: 1.5"
Age: Unknown (purchased June 2013)
Source: Same as males. 

Tank Size: 2ft x 2ft, 160ltrs
Water Parameters: Ph 7.2; Temperature 27.3c/ 82.4f Note: This is higher than I'd usually keep this species. Temperature was high due to some untypical hot British weather!
Tank furnishings: Natural planted tank with wood, rocks, plants and floating plants. 
Diet: Twice daily feeds. Am Dr Bassleer Biofish Food "forte" (54% protein); PM Frozen Bloodwork/ Daphnia. 

Spawning details: Did not witness much of the spawn, just the female clutching eggs. All eggs were placed to a plant, Sagittaria Subulata. The eggs were approximately 1mm in size. I recovered 12 eggs, however there is a possibility there was more due to the Napo's sharing a tank with other Corys and Rosy Tetras (Hyphessobrycon Rosaceus). The eggs were removed to a small pot, with an airstone and a small amount of anti-fungus. The spawn produced no fry. I believe the spawn trigger was a change in the weather, going from being sunny (28c or so) to cloudy and very humid/ muggy with rain showers. 
Eggs. This cluster has 4 eggs in:

Corydoras Napoensis are among my favourite Corys. I soon plan to set up a small tank specifically for them with leaf litter and some floating plants to hopefully encourage a spawn with viable eggs. 

Corydoras Sterbai spawn. (Cory Spawn 2)

Corydoras Sterbai                                                                                           Spawn Date: 18/04/2014
 Male size: 1.5"
Number of males: 4
Age: Unknown (purchased 2013)
Source: Captive bred
Female size: 2.5"
Number of females: 2
Age: Unknown (purchased Jan 2014)
Source (Unknown)

Tank Size:  85cm, 125l
Water Parameters: Ph 6.6, Temperature 26c.
Tank Furnishings: Planted with lots of bogwood, Lavarock and mosses. Filtered by a Fluval U3 internal filter.
Diet: Twice daily feeds, AM Dr Bassleer Biofish food "Forte" (54% protein), PM Frozen Bloodworm or Daphnia. 
Spawning Details: Spawn began immediately after a 20l water change, dropping the temperature to 24c. There was eggs attached to plants, moss and glass. However once the eggs hatched the fry were all C.Aeneus which I didn't notice spawning at the same time. Whilst watching I only witnessed the Sterbai attaching their eggs to plants and moss. There couldn't of been many C.Sterbai eggs. 

Female searching for somewhere to place eggs, with two males in hot pursuit: 
You can see this female clutching a single egg between her ventral fins:

Friday, 4 July 2014

Corydoras Aeneus Spawn (Cory spawn 1)

Corydoras Aeneus (Bronze Cory)                                                                    Spawn date: 12/10/2013
Male size: 2"
Number of males: 4
Age: Unknown (purchased 2013)
Source: Captive bred
Female size:2.5"
Number of females: 2
Age: Unknown (Purchased 2013)
Source: Captive bred

Tank size: 2ft, 60l
Water parameters: PH 7.4 Temperature 25C
Tank furniture: Fluval U2 filter and air driven sponge filter. Plenty of boxwood and plants.
Diet: Twice daily feeds of King British catfish pellets (50% protein), Frozen daphnia and bloodworm and occasional live foods. 
Spawning details: No specific trigger. Diet was increased to twice daily feeds two weeks before spawn. All eggs were layer on the glass in the flow of the sponge filter. 

Number: 150
Size: 2-3mm
Fertile: 95%
Hatch: 95%
Time: 72-84 hours

Fry diet was initially Hikari First bites, Cyclops and then daphnia as they grew. 

Video of female placing eggs available at:

Sunday, 29 June 2014

Complete list of species kept.

C.Aeneus (and albino varient)        S&F
C.Sterbai       S
C.Napoensis        S

Ancistrus Sp         S&F
Hypancistrus Sp L411

Farlowella Vittata
Sturisoma Aureum


Otocinclus Sp

Hara Jerdoni (Asia, Bangladesh)

A.Nijsseni       S


Hyphessobrycon Rosaceus      S     (Rosy Tetra)
Gymnocorymbus Ternetzi      S     (Black Widow Tetra)
Paracheirodon Innesi                         (Neon Tetra)

***Species written in bold are species currently kept. Species written in italics are not native to South America. "S"=Spawned, "F"=Fry. This list will be updated when new species are added. Spawning logs will be added to blog if they are available***