Black Ghost Knife tank size?

It is very possible that I will upgrade my 55 gallon aquarium to a 120 in the near future and I was wondering if I could get a Black Ghost Knife? I would put my two Blood Parrot Cichlids in there too. Would this be ok? Could I add anymore Blood Parrots?

 

well an 120 will do nice for the black ghost knife I would do a 150 with only 3 fish if I remember correctly blood parrots need 30 ga llons of water

 

What's the dimensions of the 120?

 

61" L x 18" W x 25" H

 

61" L x 18" W x 25" H

That should work.

 

I thought it was 20 gallons for each BP but you may be right, I might go with a 150 gallon if I find a good deal.