Mucilin works well for floatant on mono.

I'm partial to high quality hi-viz lo-mem mono for float mainline, but braid certainly has advantages when it comes to memory and mendability on a spinning reel. Still, when it comes to line control, nothing beats high quality floating monofilament on a centerpin; exceeding even fly lines. Never used Siglon F, but can highly recommend Raven.
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Matt. 8:27   The men were amazed and asked, “What kind of man is this? Even the winds and the waves obey him!”