[DangerousDave]

Originally Posted by qzar9999

I did enjoy this, but it's getting increasingly hard to believe none of them have figured out what's causing it. The chemicals even have "grow" and "shrink" in the name, ffs.

Ah well. Wouldn't be the first time characters in something I'm watching have ignored the blatantly obvious to serve the plot, and it won't be the last. I can still enjoy it. Looking forward to part 4. :-)

As you mentioned, it serves the plot. I'm very much enjoying the constant reveals of how they notice their new heights.

But even if I look at it as the characters would, I don't think it's "blatantly obvious". Sure, if it happened to me, I'd start noticing every strange new chemical I was in contact with, but I can suspend my disbelief: the doctor told them that water is the cause, citing a similar recent case. They have no reason to suspect he's wrong, and that the garden chemicals are in fact responsible.