new bala shark

[ceci]

so I have a 3 gallon tank that my rainbow shark has happily lived in for 2 years, but I decided to put a bala shark in with him and now my rainbow Occasionally chases him, but now he just sits at the top floating at an angle, so I guess I was wondering if I need to take him out or if he is sick, ETC.

bala shark is about 4-5 inches, rainbow shark is about 3-4 inches.

: video of the bala (not good quality)

 

[Colin_T]

Hi and welcome to the forum

Is you tank 3 gallons or did you miss a number?
A 3 gallon tank is too small for bala sharks. They are schooling fish that need to be kept in groups of at least 6 of their own kind and they can reach 10+ inches in length. They need a tank that is at least 4foot long while small and 6ft + when they get bigger.

The fish is probably stressed from being attacked by the rainbow shark, who is territorial and should have any tank mates in that size tank.

 

[Essjay]

If the tank really is 3 gallons and not 30, it is too small for the rainbow shark as well. The only fish suitable for a 3 gallon tank is a single betta.

Rainbow sharks need a tank 120 cm/4 feet long. That's a minimum of 45 gallons.