I enjoy Wetpixel and the wealth of knowledge that can be drawn upon when required. As others have said the forums seem almost completely gear focused.
What are ways we can increase participation in relation to just diving and taking photos?
How about a weekly dive thread?
Talk about where you dived and with who
What the condition/profiles/dive site were like
gear used new & old
And maybe attach a photo or 2 if possibe
New species sighted
Can a thread automatically generate each Monday "Weekly Dive Report ##/##/2019"