With a KH of 300 you don't need any of the baking soda. You put it in to
raise KH.

What do I do to lower thr KH? Or is this not a big problem?

Have you fertilized the lilies? If so, when and how much? My hardy lilies
have smaller pads than the tropicals, and fewer blooms.

I have not fertilized the lilies. What do I use for that? I don't want to
hurt my fish.

ShawnAnne