Black Ghost Knife

[luisprado]

I have a black ghost knife in with my Discus. I have owned the bgk for almost a year now and it has never been any trouble. It is almost 10 inches big now and he has been getting more aggresive lately. Is there any danger of it hurting my Discus? I have 10 discus in my 80 gallon tank, ranging from 3 inches to about 5.5 inches big.

[chris]

The bgk should not harm the Discus, but a night they can get more active, and may freak out the discus?

[Scribble]

We have had a large BGK in a tropical community tank (no discus) for years and it has never attacked/harmed anything, but it does come out a fair bit at night.
I would probably not keep one with discus only for the night time activity that may disturb the discus. On the other hand, i cant see discus dying from a little activity at night.

[jim]

maybe it will came out at nite eating your small tetras while you are sleeping...

[noskie]

our tetras are too smart for that ;)

[Majesticaquatic]

BGKs are beneficial to your Discus, once they are established in the tank watch for the Discus to go to where the BGKs lair is for a nice parasite cleaning :shock: Eventually you will see your Discus go to that location on a regular basis for thier cleaning services, best of all the BGK does not charge for this service.. :wink:
A 'caveat' here, once the Black ghost becomes Lrger than the Discus it CAN become too aggressive in this task and do some damage.. I reccomend trading in large ones for smaller ones once they get at about 6in. size... 8-)