CW-217 Corydoras Concolor "Rio Tomo"name: cw 217 corydoras concolor "rio tomo" max size: up to 2. 5 inches water parameters: pH 5. 5 7. 0, temperature 72 78F, soft to moderately hard water diet: omnivorous feeds on sinking pellets, wafers, and live or frozen foods such as bloodworms, brine shrimp, blackworms, and daphnia temperament: very peaceful and social; should be kept in groups of at least 6 to feel secure and show natural behavior tank setup: soft sandy substrate is essential to