Aquatic turtles including red-eared sliders and painted turtles are popular pets but are frequently kept in inadequate conditions. Understanding their welfare needs prevents common and preventable suffering.
Aquatic turtle welfare problems are extremely common and stem primarily from insufficient space, poor water quality, and inadequate UV-B provision. The minimum enclosure size for a single adult red-eared slider - a 150 litre tank with separate basking area - is rarely provided. Insufficient filtration leads to ammonia accumulation causing shell disease and eye infections. Metabolic bone disease from UV-B deficiency causes shell deformities and skeletal problems in growing turtles. The long lifespan means that welfare problems established in young animals persist for decades. Unwanted turtles are frequently released into local ponds and lakes - illegal in many countries and ecologically harmful where they establish as invasive species. The welfare of individual released turtles is also compromised by unfamiliar conditions and competition.