What should I use for a water-tight seal from acrylic to plastic?

[terraincognita]

Thank you! Unfortunately I don't have much access in this tiny 5g tank, so I don't think this will be able to work for me, as cool as it is!

This is a 4.5G AIO Frag tank I recently used as a QT

You could get very similar plumbing fixtures for cheap.

 

[Zoe’s Reef]

This is a 4.5G AIO Frag tank I recently used as a QT

You could get very similar plumbing fixtures for cheap.

Thank you!

 

[Pistondog]

use a crescent wrench to REALLY tighten it. But yes, absolutely you will get a water tight seal. you can find adapters that go from that lockline thread into a a Barb Connector to the tubing.

Or even just using another compound to create a seal between the tubing and the loc-line might be easier and work. It'd be more of a mickey mouse solution.

You don't want to overtighten when using rubber gaskets, plus you are tightening plastic threads.
Hand tighten then extra 1/2 turn. If it leaks give it another 1/4.