I have bred 3 pairs of Orange chromides in a customized 50 gallon tank. The footprint of the tank was the same as the standard 75 gallon but was lower in height. The water temperature is at 30 degrees Celsius with a ph of 7.8. Salt was added to the tank at an approximate ratio of 1/2 TSP per gallon. The tank was filled with broken pottery and half an inch of silica sand as substrate. Water change is done twice a week and the 4 sponge filters in the tank are being cleaned weekly.
The eggs hatched at their 3rd day after the eggs were laid. At their 10th day, the fry began to wander away from their parents. At that point I started to feed the fry with powdered fry food diluted in tank water.
I noticed though, that unlike other orange chromide fry that I see around the net, mine was still struggling to keep swimming at their 15th-20th day. Their numbers also start to dwindle. I ruled out the other parents in the tank eating the fry, since they have nests of their own, I noticed if a fry from another nest gets to close to theirs, they will adopt the fry and take care of it like their own. (Which is cool by the way!
Now, from a nest of a about 50 fry, I only managed to save 10%, separating them from the parents and raising them artificially.
I was wondering, what could I be doing wrong? Was it because the pairs came from one batch/supplier with a high possibility that they are siblings?
Thanks for taking time to read my post.