This is my experience and advice of keeping RTBS;
Personality: tend to be semi-agressive or semi-territorial, they can be skittish fish and will tend to spend a fair amount of time hiding (particularly during the day time) or patrolling their territory.
Stocking RTBS with other fish: You should avoid stocking fish with RTBS that look similar to the RTBS either body shape wise or patterning/colouring wise. In the wild, RTBS will try to stake out a territory and will fight off any other RTBS that tresspass on their territory, so you should avoid keeping more than one RTBS per tank as they will often fight to the death (particularly as they mature) until one of the RTBS is removed from the tank and the other is allowed to stake out its own territory.
They are not the brightest of fish in the sense that they will often attack any fish that look similar to an RTBS, so tank mates should be chosen with care. Their personality varies a lot- some RTBS are a lot more territorial/agressive than others, but generally speaking, they fall under the semi-agressive category of fish.
Habitat/environment: RTBS will spend a lot of time either patrolling and keeping its eye on a peice of important territory of its, or hiding in its territory. They like to have somewhere they can go and be out of sight of other fish- a large pile of wood or large rocks, creating a sort of cave with many entrances, is ideal for them. RTBS are primarily bottom to middle dwelling fish in fish tanks. If you have more than one type of fish that may make a lot of use out of such types of caves, i would advise having more than one pile/cave made out of rocks/wood in the tank as the RTBS will be less inclined to defend his patch if other fish are not forced to share his cave all the time.
A soft substrate, ideally fine sand (but fine rounded gravel is acceptable) is the best as they will collect any food they find lying on the subtrate using their barbels/whiskers to eat, so the substrate must not be rough gravel as they can damage their mouths trying to eat off such a substrate.
Feeding: They are technically omnivores but their diet is much more leaning towards the herbivore end of the omnivore scale. They will eat a lot of algae given a chance (not stuck to the glass though, only on objects in the tank), and will scavenge for food along the bottom of the tank. Algae wafers/tablets, blanched and chopped up spinache, de-shelled and chopped up pease, catfish pelets, TetraPro vegetable wafers, frozen or live bloodworms and krill and various other foods make an ideal diet for them. They may sometimes clean algae off plant leaves, but will not eat the plants themselves.
Other notes: 24-26 degrees is a good temp to keep an RTBS in my experience, i would also say that the longer the tank the better. A 3ft long tank is the absolute minimum recommended length of a tank that an RTBS should be kept in- with my RTBS, i initially adopted him off a friend who had kept him in a 2.5ft long tank since the RTBS was a juvenile. He was particularly agressive while in his old tank and in the early days of me keeping him, but i have found that since he has been in my 5ft long 125gal tank he has chilled out massively and is not half as agressive as he used to be now he is in a much larger/longer tank
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