Pool chemical cyanuric acid dispenser difuser

I use this to more rapidly dissolve Cyanuric Acid (CYA) in my pool than the sock in the return skimmer method.  This attaches to a return jet using a 1.5" NPT pipe nipple https://makerworld.com/en/models/1624594-1-1-2-npt-pipe-nipple#profileId-1715171.   You should still use a sock/nylon/other mesh container to put the acid flakes in or it will blow them out the holes, but using this it fully dissolves in a couple hours rather than a couple days.