[wrench]

“You can make your bleach from dry hypochlorite.”

Not sure, but isn’t that somewhat dangerous to store and handle?

I took care of several commercial pools and converted everything to concentrated liquid bleach (double the household stuff) to avoid the powders and tablets.

[editor-surveyor]

The tablets are the preferred mode of storage, but heavy paper bags of powder are easily stored in wood boxes or drawers.

It can also be obtained in PVC canisters.

[PA Engineer]

Not sure, but isn’t that somewhat dangerous to store and handle?

It is. I store mine in canning jars with plastic lids (wax seal).

I have a bleach injector and holding tank for the well. Dry hypochlorite will outgas and corrode anything around it if not properly stored.