Breeding Pristellas?

[blue_betta]

i have four pristella tetras in my community tank, about a year and a half old. ive seen them spawning in the tank on several occasions, but no fry. im aware tetra eggs are dammaged by light. would it be likely they would ever survive if i left the lights off for a couple of days if i see them spawning again. i dont want to delliberately breed them but a few "accidental" young would be nice

 

[Lateral Line]

No.

There are a number of issues.

The adults are very good at finding eggs, and will eat them. Any fry that hatch will equally be savoured by the adults.

In water with higher salt content, (ions, not "salt"), the males sperm has a reduced possibility of fertilising the eggs. This is in part due to the problem with the egg shells.

The eggs will not hatch. Any eggs that escape adult predation and become fertile are unlikely to hatch in regular tapwater. Calcium, (lesser extent Magnesium), ions in the water react with the eggshell. Even if the eggs were originally viable, the fry will not be able to break through the egg cases.

In the tropics, the sun comes up and the sun goes down. It is more regular there then in the temperate latitudes. The "light" issue with eggs is, IMHO, inaccurate. Rather, I believe that the nature of closed systems encourages the production of harmful pathogens.

 

[blue_betta]

No.

There are a number of issues.

The adults are very good at finding eggs, and will eat them. Any fry that hatch will equally be savoured by the adults.

In water with higher salt content, (ions, not "salt"), the males sperm has a reduced possibility of fertilising the eggs. This is in part due to the problem with the egg shells.

The eggs will not hatch. Any eggs that escape adult predation and become fertile are unlikely to hatch in regular tapwater. Calcium, (lesser extent Magnesium), ions in the water react with the eggshell. Even if the eggs were originally viable, the fry will not be able to break through the egg cases.

In the tropics, the sun comes up and the sun goes down. It is more regular there then in the temperate latitudes. The "light" issue with eggs is, IMHO, inaccurate. Rather, I believe that the nature of closed systems encourages the production of harmful pathogens.

thanks for that, the partens seem to spawn around the bases of the plants and the rocks. the bottom of the tank is like a sort of riverbed with a mix of grades of gravel and sand, so i think plenty eggs would escape. then again there are corries in the tank that will root them out. how would i mesure ions in the water?
the water PH sits at 6.5, i do a weekly water cange of about 10% the volume. are they easy to breed in a specific set up?