Thanks for the above explanation.

But how do i grow the carpet algae? how long it take to grow? any tip to fastract the growth of this live carpet? please advice..

a friend is selling 2 cement tank 5'x3'x17"depth, i'm thinking to get 1, enough for my space. but that tank is damn heavy. i hope it can keep 10 babies till they grow adult (lifetime).

do you recommend biofilter (to change ammonia/nitrit/nitrate)?