Not too sure as to what a "rocket tail loricaria" is, and Google's being awfully stubborn about the whole thing. If they are a Loricaria species, then it could be expected of them to be a substrate-dweller, often scooting and shuffling about on the floor (and occasionally half-burying themselves, if given the chance). Substrate should generally be finer sand, and open stretches of it should be given, as they rarely ever leave the bottom, and thus the total amount of used space is often just whatever open ground is available. Bloodworms and occasionally some high-quality prepared foods are readily taken by most of the genus. Seem to lean towards a more carnivorous diet. Not an aggressive eater, and often quickly outcompeted by other fish. Not particularly aggressive or territorial. Water should be reasonably soft, with a slightly acidic pH. Some flow and warmer temps are readily appreciated.