Not sure for the 20g since the male bristlenose will be very dominant if the rams get near his cave. I have seen the male attack the same female he mated with just because she wanted to mate again or was just in the wrong place. Not a good thing to see since he can and may kill whatever goes near. The male GBR may even attack the bristlenose if he has eggs. I think the rams or plecos should have their own tank with only upper level fish. You're selling the discus, right?
72g still looks overstock on the bottom. Too much rams with the corys. Angels...don't know. If I try to imagine how your tank would look like, I feel like their isn't enough room for all the angels. Maybe have 4 angels only so you see the rasboras school.
10g and 29g sound fine for the stock listed.
72g still looks overstock on the bottom. Too much rams with the corys. Angels...don't know. If I try to imagine how your tank would look like, I feel like their isn't enough room for all the angels. Maybe have 4 angels only so you see the rasboras school.
10g and 29g sound fine for the stock listed.