Be sure to cut at least a inch off the stand end of your Christmas tree before putting in the stand so it can take up those nutrients.
Done that every year of the 25 we’ve had it. Now, it’s 2 feet shorter, but the aluminum is very healthy. ;-)
I have 5 indoor cats that use the tree water as an extra source. I wouldn’t be able to use the recipe with bleach in it for fear my poor kitties would get sick.