Hypo is a co dom trait meaning if you breed a hypo to a normal, you get hypos in the litter as well as normals. You would need Either
1 Hypo het anery and 1 anery
1 hypo het anery and 1 het anery
2 hypo het anery.
The last and first ones will give you the most % of ghosts than the other I posted.
Hope this helps