Anenome Sperm

I had the same thing when i had an aiptasia problem (peppermints sorted them out)

The large aiptasia was releasing a sort of mucus which by it's viscosity i assumed was sperm, like you i also wondered if it might have an impact on the quality of water.

Due to the nature of the liquid i have found its more than easy to remove by using a wooden skewer, or a net.
Just wrap it round and remove it in strands.

Kinda gross i know but i guess alot of reef keeping is lol.

 

omg thats amazing - a pic of it shooting out - i always beleived that they split themselves in half too.