An Aqua One PL11 compact fluorescent tube half sunlight and half, softer, warmer tropical. Our favourite combination and Ideal for all tropical and cold water set ups. This tube will bring out your fish’s colours and provide a bright visually pleasing environment for them to enjoy. When changing any PL tube take your time and only ever grip the plastic base of the tube. They can become quite stiff to remove so take it slowly and gently wiggling the tube from side to side until it pops out. Make sure the new one is pushed firmly into place.