Just to share this simple idea of DIY your own betta box for those reefer like me who couldn't find a suitable size Betta box for tempory housing of their fish or for use on trapping their fish inside the tank.
Material needed :
Plastic egg crate
Cable tie
Stylo foam block ( Or anything that can keep the egg crate afloat )
Below is some photo of the simple DIY betta box i make for housing of bigger fish in my tank.