SPOILERS ACT 2 - Help with Shar's quest impacts

[AereoPaps]

Well just finish the Shar puzzle, and when i'm going into that shiny "pool" (dont know how to describe it), the game warns me about some quests could be interrupted after going foward, so what quest should i do first? Should i go to Moontower before finishing this? Because i tought that the moonrise was going to be the end of ACT2, or is the Shar Glauntet that leads to ACT3??

[Grumpy]

You were supposed to infiltrate Moonrise as Jaheira told you. Go there and explore everything then you'll go back to the pool.

[Dragnier]

I would recommend to visit Moonrise Tower first. You can enter peacefully and talk with several NPCs, and also continue with some quests like Rescue the Tieflings. The final floor of the tower will be inaccessible to you. You will discover that you need to go to the dungeon to look for Balthazar & and the Nightsong and that is where you are right now.
Basically, once you enter the pool you are starting the end of the act. Once you complete it all Moonrise Tower will turn aggressive and you need to go to attack it together with your allies. Probably it will be too late to try to rescue the tieflings and relevant related quests.

[retsam1]

Originally posted by AereoPaps:

Well just finish the Shar puzzle, and when i'm going into that shiny "pool" (dont know how to describe it), the game warns me about some quests could be interrupted after going foward, so what quest should i do first? Should i go to Moontower before finishing this? Because i tought that the moonrise was going to be the end of ACT2, or is the Shar Glauntet that leads to ACT3??

If you do the objectives after entering the pool, the moonrise tower becomes essentially a red zone and denizens aggro you (either if you kill the nightsong or you rescue her depending on your play through choices).

The effects some other Act 2 quests and hence why doing any side stuff before you go there is recommended.