mandalorian92 - or you can make a concentrate and use that instead. For example, in 1L bottle, mix it with 10g of sodium bicarbonate.
Then, add 10ml to 1L of water. I personally make a concentrate solution of 200ml water and 2g sodium bicarbonate and add, using a syringe, 10ml of that solution to 1L of Zero Water. I’m not fussed with the exact concentration of 80mg or 100mg, or thereabouts, per litre.