More dangerous sulfur pools

The sulfur pools found in the sulfur caves should be more dangerous.
I like the idea of them giving nausea, but after prolonged exposure to the noxious gases, the effects should worsen over time:
1) When staying in them for a couple of seconds, they would give nausea for 3-5 seconds.
2) After 20-30 seconds, the nausea would stay for 10 seconds and poison should be applied for about 5 seconds.
3) After 1 minute in the pools nausea would be applied for 30 seconds, poison would become poison II and be applied for 15 seconds, and blindness should also be applied for 5-10 seconds.
4) After 1 minute and 30 seconds in sulfuric water, the entity would take burning damage and then die, giving a new death message.
Sulfuric water could also be put in a bottle to obtain "Sulfuric Water Bottle". With it you could either:
- Brew nausea potions
- Craft some kind of throwable bomb that would release noxious gases in an area and give the same effects as the sulfuric water.
Also, mobs with nausea should be clumsier and slowier