My pair that I am trying to sell have spawned for me a few times.
They are a larger species of Bristlenose, so the fact that are huge by common standards is nothing to fret over. They are more picky to spawn that the commons, there is no doubt about it. But the same rules apply. They come from the same river system, they spawn at the same time because of the same triggers.
The problem is that they are very picky about tanks, the position of the cave etc. and are quick to boot the eggs if something bad happens. So you need to keep them in a good sized stable tank with lots of cover and good water movement and filtration. I have found that the last two make a big difference. I spawn mine in a 2.5ft tank with a 1500l/h internal and a sponge filter, so the water moves alot and is loaded with O2.
I grew my females up from fry and they were much larger than commons when they started to look like being gravid so i wouldnt worry about size, just feed them up right and let them go
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