Staff at the Great Yarmouth Sea Life Centre in Norfolk give turtles a seasonal treat of brussel sprouts at Christmas which provide a healthy dose of vitamins, minerals and fibre.
However, the turtles, like humans, are prone to heavy bouts of flatulence after eating the vegetables.
Last year a turtle at a Sealife Centre triggered overflow alarms in the middle of the night after the splashes from gassy bubbles hit overflow sensors.
Now the Yarmouth turtle tank -12 feet in depth and width holding 250,000 litres of water along with George the 3ft long green turtle - has been partially emptied for the festive season.
Thousands of litres have been removed to lower the water by a six inches and keep the sensitive alarms clear.
Displays Supervisor Christine Pitcher said: Last time an aquariist had to dash to the centre in the middle of the night, so we're not going to take any chances.