Thanks for help aye never got to see the tank she came out off the person met me at front door with her. Aye took her home put her into quarenteene tank for 2 weeks the put her in my big tank its 8 foot 1000 litres with 2 fx6 filters aye do weekly water changes approx 400 /500 litres. She didnt eat much at first when aye got her but now she eats no problem atoll prawns pellets ect but been 10 month and not grown atoll thanks for helphttps://www.sciencedirect.com/science/article/abs/pii/004484869390024S
Also, it doesn't have to be just the circumstances in your current tank affecting growth. Age of the fish, or history in its previous tank may be factors also.