Flouro lines can be fickle when it comes to knottings. Reason being is that it does not relax after being stressed in the same manner as mono. Mono can be stretched, and as long as you haven’t put too much stress on it, pulled it apart too far, it will recover like a rubber band. This actually works to prevent the knot from over tightening and weakening the material. Makes the material a good choice for fighting big powerful fish. Flouro will also expand when stressed but there will be no recovery. It will remain elongated. Now mind you when this happens it is not a consistent thinning along the entire length, rather it will get thin over here, and thin over there kind of an affair. This leaves you with a line that is no longer up to ratings.

For crappie this will not be an issue, however if you snag quite often it could present an issue. The knot will tighten when stressed and will remain that way. As long as you understand that you are good to go.

Flouro will also sink at a different rate than same diameter mono. It absorbs less water than mono. It behaves a little different when casting. It is not invisible underwater as claimed. There is no invisibility when it comes to strings. The best way to achieve less visibility is to go thinner. A mono line that is thinner than the flouro can be less visible. If flouro truly was invisible underwater due to it’s patented molecular configuration, well it would still be invisible in the 250 pound test size. Which is very easily seen I assure you

Some swear by this though and have stories as to how it made a difference. Well there can be many reasons why they did better, but invisibility was not one of them.

If you are looking for finesse, consider a thin mono. Varivas sells Japanese stuff, which tends to run thinner than what we normally have access to, and they have sales. I think it’s 25% off right now. Not sure. Sponsor here.

In conclusion, I suggest you stick with the same pound test rating and try to go with a thinner mono, which Varivas will certainly have. Flouro offers different performance in several aspects, but you didn’t mention why you wanted to try it, so I guessed to be less visible.