Yes, in the application that I have in mind the foam core would be exposed to water on the ends. That's why I am asking.
Anyone know if the foam IS toxic?
Otherwise, I will err on the side of caution and not use it.
125gal FOWLR, 20L Sump w/LR and Skimmer, 20T Fuge w/DSB, Cheato, Pods and Algae Turf Scrubber