- I dissent.
That said, it seems there is some debate as to whether or not an alkaline filter actually does anything, or that alkaline water itself has any health benefits for humans.
If it were me, I'd skip the alkaline filter and instead use a regular filter in the Brita to remove impurities--just to be on the safe side.
So from my hopefully correct memory, I also would skip the alkaline filter, also with Sef in doubting this really makes a difference since increasing hardness, getting water for fish more alkaline, is a difficult process because good things like calcium carbonate (for fish) dissolves so slowly. A quicky, maybe not so good method to mitigate acidity is to add a calculated amount of baking soda, for which there is a chemical reaction. You also get saltier water.