Help me fix acrylic turf scrubber

[S2G]

I have a waterfall turf scrubber. The seam that connects the box to the base is leaking. Anyway to seal this without disconnecting everything & welding it together? I tried flex seal & it started leaking after a week again.

 

[Ratherbeflyen]

You might be able to get weld-on 16 in there.

 

[AdamD76]

Get the really thin weld-on. It wicks right into the crack. I used it on a broken protein skimmer and it lasted years after.