hi... thx for the comments.
the tank is 6ftx2ftx2ft = 640L. Lighting amount is 9x36W and 1x40W = 364W. Yes. That is japonica. They growing very healthy.
the tank running with a taiwan made 1200l/h canister, the filteration is not as good as eheim. That's why the water still cloudy. Planning to get a eheim to run on it.
Some plants in foreground growing quite slow. due to cant really get the lighting. (i m quite a lazy fella. seldom trim the plants)
emmm...was wanna change the background to blue. But end up can't get it in that moment. so...just used the black. Anyway, black look cool and working fine.