See, this is where I start to get lost.... :( I understand a kalk stirrer stirs kalk water, but why is that better than just putting 5 tsp of kalk in my ATO when I fill the bucket? I imagine the kalk stirrer just allows for more kalk to be stirred, thus automating that process further, but is there any other advantage? I am wanting to keep this as simple as I can. I do not want to add any more equipment to the 75 right now since the maintainence is so doggone easy.