Half-moons are beautiful! At the moment I am temporarily housing an elephant ear plakat in a Marina Breeder Box. It's hooked to the side of an 8g shrimp nano w/sump. Maybe that would work for you? Finnex has them as well, they get continuous water changes from an uptube... Below is a view of the box with him in it. Think it cost $16? and I hooked an old airpump for upflow...
Best of luck with your half-moon and tank!
PS-sorry about the photo quality, but this one shows the box best...
29g heavily planted SA: driftwood, Ram, Angel, Tetras
10g Tang: rock w/anubias, Caudpunk trio
8g Nuvo: Cherries, driftwood, java moss and fern
10g 3x divided Betta planted