Yeah.
That game. The game that gave me problems. I have a question.
Chemical plant zone. Enough said.
How do you get past that poisonous water bit? I've tried at least 24 times.
Help PLZ!
Ok, I now know which place you are refering to. Sadly I don't think there's any alternative route in which you can avoid that part. I can definitely see how it can be frustrating. The same area was in Sonic 2 but in Sonic Mania that climb actually seems longer.
I think you just gotta keep trying. Getting the timing in the jumps is the tricky part, 'cause if you fall down you're likely to drown. You can also get squeezed by the blocks which is even more annoying.
There is, however, a bubble shield you can get that prevents you from drowning if you take the lower route initially and turn left at the first tube-crossroads. It's kinda tricky to get but it's in an area that's under the pink water. You can see it next to a box of rings. If you can get that and keep it until the first checkpoint it should make things a bit easier.