hair algae from hell

It appears I've got some hair algae started in my tank.  (40g octo,
half-dozen small cats and otos, lots of plants.)

It only got bad when I got the pH up to around 8.0 and the hardness up
in the 2/3 range.

I hate cleaning tanks (witness the oto's), so is there anything anyone
can suggest to eat/destroy the hair algae?  will black mollies eat
this sort of algae?