I used it in the carribean without much issue (a few pictures got a slight red tint but were fine, and using it out of the water makes everything red).
But I used it in the ashuelot river and forest lake last week and everything was red

When I went to cas pond and used the auto mode I usually use on the surface things came out fine

The instruction booklet says to use snorkel mode at depths below 25 feet and dive mode deeper, but sometimes a surface mode seems better. Can anyone tell me under which conditions it is best to use snorkel mode?