Troops, if you suspect tireness, tried putting him a day in low water level, not covering his shelll and see if he pants like in water..
If he pants like in water 2min span once, seems like respiratory infection though.. Are there other symptoms like appetide? Eyes got swollen? Is he active?
Better quarantine him from others to monitor him..
Timmy, thanks

Ninja is now growing fast and eating a lot... One week he grows like 0.5cm in width or length.. Very strong now to struggle n kick.. haha..