ah its the center support bracket.thats actually an easy fix.any piece of plastic atleast an inch wide and stretches across it will work by just siliconing it where the other was..or even using some rope will work as well.u dont want it to bow out so if its rope and a little loose when the tank is empty is fine.as long as it doesnt bow out too far anything will work...
i thought a while back about getting ghost shrimp.even thought about it earlier this morning.but have read many times bettas make a snack of them..rite now i have 2 mystery snails and an oto in my 10 with 1 of my girls.they are fine together...
that would be something to clean.heck would even work as a summer time outside breeder or out side tank in general..like on a porch or patio..