6g office nano, 20g aio cube, 2 x 40g breeder community and 75g
It's not optimal, but it isn't a dire situation. Clean as well as you can and continue your water changes. You can do larger or more frequent water changes to lower the nitrates if this is causing some algae issues. You could also add floating plants or a house plant like Pathos to the aquarium to suck up those extra nitrates.