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Wondering what you use to test pH? I've tried salifert and api.
[IMG] purple stylophora from @beckerj3 . Thank you. [IMG] pencil urchin from mermaid's cove.
Sure. For those looking for a preview, the following shows part of a talk, NG Live!: Mapping the Unknown, Part 1: Kenny Broad and Blue Holes
Kenny Broad (I think of National Geographic), a diver and environmental anthropologist is giving a talk entitled, "Extreme Cave Diving: Exploring...
PM'd
Ditto.