Quick questions regarding Herbie style drain

[ReefJunkie]

1. My drain pipe is about an inch under water in my sump, but my last tank, my drain was 45'ed and ran into the wall of the sump above the water line
2.Solid pipe
3.I used to use a standpipe in my last tank but now I just have a standpipe on the emergency and bulkhead for drain (gate valve controls the water level not the standpipe)
A few pics