Rough purchase size 3-4cm.
A spacious tank is required, preferably with a sandy substrate. Provide hiding places and shade with some big chunks of driftwood and smooth rocks. Dim lighting is also beneficial, and it’s imperative that the water is highly oxygenated, preferably with a good amount of movement. Consider the use of powerheads or large airstones to produce the desired effect. An efficient filter is needed to deal with the large amounts of waste it produces.