Are you having it spill into the pool or just be shallow ? If its a part of the pool with no spill then I wouldn't do bubblers . And our is about 5-6 inches!
The only issues we have had if someone steps on the lights it can break the seal and water will short them out so we put the lounge chairs over them so it's impossible to step on them! At night time they are a focal point of the pool for sure!
Looks great!!! I have one question on the back side of the pool is it going to be sticking up out of the ground or are they going to backfill? Sorry to ask but it looks like its out of the ground 4 ft in the pics.