Yup. them's the ones! In a 55G with only 4 Pictus? I would say go for it! I have 4 of the Kobutai & I love them. They are so much fun to watch. Just make sure you have plenty of hiding spots for everybody, as they might lose a fight with the Pictus. If I were in your shoes, I'd be tempted to throw 6 or 8 Botia Kobutai in there! You will need to treat them for internal & external parasites, though. Warning: They will play dead, burrow under decor, sleep on leaves, use other fish as ramps, re-arrange the substrate & trim your plants (whether they need it or not). By far my favorite fish I have ever kept. The bigger the group, the healthier they will be. They are awesome when they shoal at feeding time!