help sexing my new borellii's!!!!

If the fish are around 1 inch or smaller it can be very difficult. Normally males are larger and show more color wile the females are more gray and are plumper. Unfortunately batches of fry get mixed and mostly the reason is a poor male female ratio. Young males and females do look a lot like each other. It will take some time becouse it is more obvious what the gender is.

Why do you need to know the gender?

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Well thats obvious,.....apisto's should be in a harem and in smaller tanks males kill each other. So he want to end up with one male and multiple females to be more successful in breeding.

The Borellii are just introduced in the tank and do need to get used to the new environment and your water prams. Within 2 weeks they will show more color as ever before. Do keep an eye on their behaviour! If fish start to clamp fins or hang in a corner I suggest to come to the board again.

Borellii,

I wish you good luck and patience with your new fish. I purchased a group of borellii juveniles last September. They were all about a half-inch in length. Got 19 fish and ended up with 2 females. I can't even begin to tell you how many hours I spent staring at them thinking the same thing. At the end of the day, the only thing that ever seemed apparent between the males and females was the height of the dorsal fin. As the fish grew the females had dorsal fins that stayed very low to the body with repect to the other fish. This was very subtle though. All other markings were shared with the males until color began to develop. It took me 2 months to pull out 2 fish I knew were females and separate them with a couple of males.

Best part is that about a month ago both females spwaned for the first time and had fry free swimming fry within a day of each other! Good luck.

Brad