Shark Aquarium has had a nice Flower for a while. It's priced at $250, but with the 15% discount on the 8th, it might be worth looking into. It's about 7" disk. A little smaller than you're looking for, no?
220 gallon and one massive or 2 eh size ponds in the works have the liners can't find heaters... 5x3x2.5 will be up soon then I'm gonna 8x4 7x4 etc... maybe bigger depends on the lazy factor.... TG I would buy it but ill be ocmd that weekend... plus I'm kinda scared you remember the fungus on the rays in the system that ray is in......