Of the various brands/batches of glue used recently, this one has been the most reliable so far. Pure Aquatic Coral & Plant fix - Cheap, good & very strong.
My gripe with this brand previously was that the nozzle clogged quite easily & went to other brands.
But realized the other brands are either not sticky enough to hold corals properly or they cannot dispense properly. A fellow reefer taught me a good workaround of NOT using the nozzle. But instead squeeze out a blob of glue just before storage.
Simply break off this blob of glue the next time you want to use & its ready to go! Works very well even after a long time in storage. Apparently the blob forms a barrier & the tube content is well protected.
3D printed pinch valve for calcium reactor effluent.
This type of pinch valve physically pinch the tube externally. Its best for CR as there are no sharp edges for the fine particles of the effluent to clog. Probably put some up for sale if there is interest.