Green Water Project, i made it!!!! Options

[white horse T1]

special thks to HB, sq guy and desireless, i learnt from all the advices on lights, tub and methodology + pictorial guidance.

while fighting a nitrate problem in main tank at hand, i realise not enough fish in tub to give the ammonia so increase the fire power.

i made it....after 8 days.

[ranchuman]

I am curious about keeping 1 ranchu per tank/tub/container. I noticed that whenever i keep just 1 fish per tank, the fish becomes slower... as if feeling lonely    Does anyone notice the same thing? or this is just my mind playing tricks on me 

I also notice that ranchu tends to be less active when being left alone. When I place it back into the main tank, I can see that it swim around actively with other ranchus ..perhaps the main tank is a lot bigger that quarantine tank in term of size.