I used to bake baking soda, but it was such a PITA to dissolve after wards. I considered trying to blend it back in to a powder to get it to dissolve better, but I was afraid of damaging the blender. I've been using straight baking soda since this tank was set up and it's gone swimmingly so far. I've never really tested pH though. Dissolves better if you add it to the hottest water you possibly can - hot water for baking soda (which is quickly cools), and icy cold water for calcium chloride, or it starts to boil. Chemistry is cool.
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