[MiamiAG]

If it's acrylic to acrylic connections, use Weldon #4 or MC Bond. You can get them at www.craftics.com.

Tubing can be found at www.mcmaster.com, www.usplastics.com and others.

Make sure to purchase cast acrylic as opposed to extruded.

 

[MiamiAG]

Extruded will not hold up for aquarium use. It is typically used for point-of-sale material that will be thrown away. Extruded will craze (spider cracks) as it absorbs 40% more water than does acrylic.

Bite the bullet and get cast material. The US cast is best but expensive. If you purchase import cast, use Chemcast. However, I would not build an aquarium out of it.

 

[MiamiAG]

Why do you want tube so small? You may need to go clear PVC for that.

 

[MiamiAG]

Yes, try clear PVC or a nice schedul 80 pipe (grey). Post pics.

 

[MiamiAG]

Best is Weldon 40. You can buy it at www.craftics.com. You will need an applicator bottle to apply it.

If you can't get the 40, PVC glue will work but I wouldn't recommend it.