thanks both, i'll be updating this regular.
i wont lie this week has been a bit stressful, never tested water so much and vac a tank out lol but im happy now its back on pellets i can relax a bit. i'll keep the water schedual up but should it just makes regular feeds easier, and they better for him.
next job is to start looking at options for the tank upgrade, been weighing up koi holding tanks, glass tank or even building an acrylic tank, this will be the next step until i build the pond which i'm already collecting bits for hahaha.
its all a question of depth at the moment, how deep would the tank need to be.........