I just got myself a new PS and was wondering if anyone else has used them. Its a hang-on PS but with a few mods on my new sump ive made it a semi-hang-on ill send a pic of my sump later. Im not sure if its ok to give links but you can always google Macro Aqua
The skimmer work fantastik. It uses an needle wheel. The only downside is that it lets out too many bubbles. I had the use for layers of thin stockings to prevent that problem. Other than that its all good. Its a fab skimmer which make super bubbles.