By the lion's mane
"I know how to get here now. If the door slams shut or if we can't reopen it right after the flow drops off, we'll go visit Dockside and come back with a clam rake, or buy a cooking sieve in Little Sahud. We can use that to drag coins out of the pool.
"So, Jocelyn, you cast your spell twice for Mel and me while we aim, then we'll shoot the arrows into the braziers, while Clarence stands ready to slam the door and turn the wheel before it starts to build up any depth. I don't think it's a great idea to be wading in that stuff, we'd probably all need new boots and hose.
"And of course that's all assuming this works. We can't be sure it will. While it surely looks like someone set this up as bait, we can't make out the full inscription. It might say something like 'don't set a fire in this room if you value your life.'"