Doesn't the top fill have jfc? Maybe it wasn't closed when you filled.Dvarw mtl fl came in today, leaked like a sieve on two attempts at wicking [emoji3]
Tomorrow I'll go back to the bottom fill setup, just in case there's s anything wonky with the top fill add-on. Gotta take another look at the wicking methods, try a different one.
(I'm rusty on tank wicking, since lately I've been doing trivial squonk RDTAs with rayon.)