Ink Flower

I really enjoyed this one and added some adjustment layers (brightness/contrast) to bring it further to life.

 

Ink Jellyfish

I sped up my flow on this one mainly using the flat and soft wash brushes in several layers and some white spatter. To get the glowing outline effect, I duplicated my line layer, changed the blending mode to overlay, resized and offset it slightly, before using clean water to soften. I think it works quite well.