My favorite TL puzzles always share one property: the minimum is 5.
Wait a minute, it’s not TL. I keep thinking it’s TL but it’s Tl. Wait, sorry, TI.

Y’know, this puzzle really should’ve been called “Stab-Water”. It is very similar to Stabilized Water (it provides two of the same water inputs, they must be bonded together, one of them must be calcified, and min TI is 5) and it is literally water for stabbing…if my intuition is correct.