well im thinking of ditching my comman pleco and getting a black ghost knife fish!!
well they mix well with my oscars and green terror?
if any one has info on this and can let me no if it would work that would be awesome
also what would they eat?
info:
have a 135 gallon tank
6ft long

You have more than one Oscar? To be perfectly honest, you really don't have room for a BGNF as these fish can well exceed 12 inches.

ya two oscars and the green terror

Personally I wouldn't recommend adding such a large fish to what you already have. However, that is just my opinion.

really not even with taking the comman pleco out?
i would of thought that removing the comman pleco which can grow bigger than the bgkf and im sure shits more than it to........would actually be better?

Okay, let's break this down. Two Oscars really do require an absolute minimum of 100 gallons to themselves. Then you have your GT, I think these probably need around 55 gallon for themselves as well, so you're already up to 155 gallons not including the black ghost which will need substantially more than one adult Oscar.

Some people may say that it would work if you have extreme filtration, however having kept fish in a 125 gallon tank myself, I wouldn't do it myself because I just think it would be too much work. However, you can always try it but you really will meet a lot of filtration to cope with these fish when they are adults.

pauly187 wrote:

with adequate filtration, you can try having 2 oscar...but i am not
familiar with GT in a tank with 2 oscar....however, i used to see a
125 gal tank with 2 oscars and few SD that goes along well.

i see were your coming from now
well my filtration is two aqua clear 110's
and an fx5
so maybe around 1650 gph

What are your water conditions at the moment? Also, do you know how high your nitrates get at the end of a week?

yes i do
i test before water change and after
actually have the test resaults still from before the water change i did today!!
here is a picture

its at about a 25ppm as you can see before water change today so they dont reach to high
after the water is changed it goes back down to an easy 5ppm very very light orange.

Putting the topic of whether your tank is big enough to one side...

Black Ghosts Knife goes fine with Oscar. I have one about 15-20 cm long ans it is crazy. Doesnt hide during the day like most I have seen, is out and about all the time.

All the other fish just ignore it - even if my pair of Oscars are guarding their rock, and chasing everything else, they just ignore the BGK.

AS for food - they will eat just about anything. For a treat I throw in bloodworms after all the lights are out, the BGK eats the lot

awesome
i love the way they swim aslo very smooth like haha
i think i might get it
see how everything goes
get ride of the pleco and keep an eye on the water
and if worst comes to worst and i cant maintain good water ill get ride of it