Try the Durso first. it is much better than nothing is super cheap and not permanent. I do love the Herbie though.
Living on the edge blocking the overflow........
YEAH I KNOW.. i dont wanna keep it that way.. that's why i was looking for an alternative before changing things
the cs50 was just sooooo quite.. i was hoping i would have similar results but alas. its either vortex tank or gurgle noise with this model
so durso it is!!
and if that doesn't work, i'll be looking into a herbie