what to feed black ghost knife fish

[bryce2003]

Lee,
Either or it doesn't really matter as I've had my 2 in with the combinations you have above and had no dramas. However they don't tolerate higher ph levels very well either from what I have been told. Also if you ever need to medicate your tank be careful and use only half the required amount as they are scaleless fish. Just make sure there is enough hidding places for them. Mine eat anything and everything I put in the tank from bloodworm to flake, algae wafers to other fishs crap. I've found mine are gannots and will eat anything and everything. Like most/all fish they are oportunistic feeders.

Best kept in groups and they 1 of the sweetest fish we have availible.
Cheers,
Bryce.

[Bubblesx4]

Velvet is a disease that is often caused by stressing these fish and poor water quality.  It's very hard to detect on black ghost knives, when looking at them in the light they have a fine gold dust appearance on them.  Depending on the colour of your ghost knive whether it is black or blue colour, it is easy to see on black rather than the blue.  Yes they are black or blue depending on the shade of their skin, quite often as they get older they seem to get greyer or more blue colour.  I find this is because of the conditions are kept under or simply their size my biggest one goes between blue black and black depending on water temperature and when he's been feed last.
I don't know about keeping with Africans as I don't keep these fish, I used to keep mine in a community tank with clown loaches, bristle nose, Corries etc. Now I keep them in tank on their own, I currently have five in the tank with the big fellow.  The used to have a lot more in their but I took out the small ones just in case the big bloke decided to munch on one of them.  I also find the small ones eat more live food as they are so much faster than the bigger ones.
I hope this helps
Cheers Danae.