Don't feed the tank for a few weeks. They'll die off.
so will my shrimp!
and my DUMB betta ignored them till the no planera hit them ... then the betta was like.. 'look food' ... he got taken out while meds were in the tank ... dumb betta.
and i DO NOT feed much at all... they came as hitch hikers.. and it's not a big problem but they creep me out.