Aptasia..... Ro & Di Resin ???????

[subman]

that looks like fw aquarium gravel. Should go away.

Give the aiptasia a shot in the morning with your choice of killer juice right in the mouth works the best.

get a reactor with GFO and the phosphates will go away

[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

[subman]

I say morning because I like to see what I'm doing, do it right when the lights turn on.

Gfo does remove phosphates not stabilize the levels.

[FitoPharmer]

I think moncous is kinda right on not using phosphate remover. Your better off doing relatively cheap water changes and isolating the problem then using expensive chemicals. I would remove that substrate. It looks the the finer version of crushed coral. Not ideal for long term use without vacuuming.

[Realshow]

Thanx for the info everyone.