Alasse

I've just purchased 2 bristlenoses, a male and a female. They would be approx. 2inches.

Can anyone tell me what size they breed at? Do they require special conditioning to breed?

The tank they are in has very little algae, (the tank is theirs alone) so i have algae discs for them, is that sufficent? I really do not want to encourage algae if possible as the tank is a planted tank.

Dino

A lot of the bn's will breed just a little larger than yours are.
Sliced zuccini is an excellent food sourse for bn's.
Make sure to give them both algae and shrimp pellets.

Chief_waterchanger

When they get ready to breed you will want to supply them with a tight fitting container/hole in driftwood/something very closed in. We use a ceramic pot that is flat on bottom and looks like a flask laying down. It is bulky on the majority of it, but the opening is just large enough for the BNs to fit into. They tend to only breed for us when we provide such a space.

The males tend to clean the space, and then he lets the female in for anywhere from a few hours to a day or two. He runs her off and fertilizes and guards the eggs, while fanning them with his fins, until they are hatched and usually about 3days-6days post-hatching. (Sometimes our male tries to guard them until they have to literally escape from the nest. )