Hi,
Time and time again this sort of question comes up so I will reiterate,
Golden Wonders (Aplochelius lineatus) are predators by nature, they are a colour morph of the normal wild type.
http
/www.bajcik.pl/sklep/shop_image/prod...30eab26649d.jpg
Under proper aquarium conditions they can and will attain a size close to 100mm. The problem lies in their predatory nature and the size of their mouth is cavernous once fully open. In dealers tanks they look beautiful when around 2"/50mm but dont be fooled as soon as they are mature enough then small co-inhabitants will (sooner or later) start disappearing. Small Guppies and Neon Tetras would be ideal fodder for an adult Aplochelius.
So my advice is to steer clear if you intend to keep smaller species alongside this predator.
People are going to say on this forum "Well mine are alright". Believe me from experience a 100mm Aplochelius is a monster.
I don't mean to put you off but speaking from experience they have no place in a small species orientated community aquarium.
If you ar looking for a small surface Killifish species then go for
Epiplatys dageti Monrovia
or
Pseudoepiplatys annulatus .
I hope this was of some help.
Regards
BigC