68 Gallon Rimless Reef Build

[gregzz4]

You can get the adhesive-backed cable tie anchors at electrical supply outlets, or Rona and Home Depot etc

As for your air intake issue in the sump, I don't think it's your bubble trap
It looks like your pump is moving a massive amount of water and you need to either;
A - Put a valve after the pump and slow it down some or;
B - Raise the water level in the return section more ( maybe not ideal depending on your power out level )

What model is that Iwaki pump ? I can't make it out