Elegant and fast way without chromatography to remove fluoride ions from water phase without contamination of the polar water soluble product?

I have a challenging purification routine. I want to remove fluoride from an aqueous solution, my product is a phosphonic acid, which is readly water soluble and an anion.
The anion is about 200 Da in weight and carries two negative charges. It would be nice, if purification could work in the 100mg - 1000 mg range (Basically 100 mg of validated pure substance should be sufficient for most biological and physical testing, but its just nice to have some scaling capacity).
In the solution the anions *-in an ideal scenario-* are my product and the abstracted fluoride (and maybe OH-, depending of the base). The product is very water soluble
and fluoride abstraction is likely to make it even more polar. After the fluoride abstraction, the F- anions need to be removed from solution. I know that you can precipitate fluoride with Ca salts, but are there also other ways to achieve this? I am worried that Ca will also precipitate part of my product out of solution. In previous experiments I saw loss of product because of Ca addition. Some kind of selective catching would be nice. I am wondering if scavenger exist, that are selective for F- only.


If there is no easy approach I would use ionic chromatography, but usually this is kind of time consuming, because you need to mix buffers with specific pH, equilibration takes quite long and than evaporation of water is also a factor, so any hint for streamlining is much appreciated.


Edit: Added more information on product.


Edit2: If you downvote, please be so kind and provide some explanation, otherwise no clearification can be provided.


