Why does your chemical tubing explode?
Because it can’t take it anymore! In short, because of material fatigue. Plastic material will become brittle over time as a result of UV, heat and chemical exposure.
Tubing should be inspected routinely for abrasions (is it rubbing against anything?), nicks or cuts. If tubing becomes kinked during installation or tight radius bends it will “bruise” and eventually leak. Tubing exposed to sunlight must be UV rated (often black). You should use the highest pressure rated tubing appropriate for your system.
Chemical leaks are bad. Chemical leaks are unsafe. Chemical leaks can be expensive.
Only love lasts forever. Change tubing before it puts you on notice.