OK from your post we have new to kelp and buoyancy control issues. Both solved by diving and lots of it. PM me and lets get wet.
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Here is some great info from Chuck's website.
Kelp Diving Information
The key really is streamline your gear with as few dangles as possible, which includes fin straps, and whatever happens do not panic. Kelp can easily be broken.
Kelp diving is also a magical experience.