[monocus]

use a syringe with a needle to inject them.i usually use lemon juice,but i guess any type of acid would do-do not inject more than 10 a day -try to keep the acid down in the tank.you can also mix up a kalkwasser paste and smother them-making sure you cover the base as that is where the daughter cells are.and do it in the daytime-not at night as this would release the daughter cells .worse comes to worse and they do spread i can sell you some berghia to take care of the aptasia.
the membrane doesn't matter which way it's mounted-mine is horizontal .
a reactor will only keep your phosphates stable-not lower them.if you can ,build yourself an algae scrubber.i've had mine running for 4 days now and it has lowered my phosphate to .17 ppm from .28 ppm and my nitrites from 90 ppb to 64 ppb.
try a pool sales and service for the resin