How much of a bio load, if any, would say a dozen scarlet hermits and a dozen astreas cause.?? <img src="graemlins//confused.gif" border="0" alt="[confused]" />
With only 12lbs of lr I don't think that many turbos and hermits would be needed. I'm not positive but I think if they don't have enough algae to eat they might starve. I have 55lbs of lr in my 29gallon and only got 3 large trochus snails and 20 hermits. The bio-load however would be no problem.
Lr produces more algae in the tank with the surface area it covers and because of it's bio-diversity. I have never seen hermit crabs eating off the glass or my substrate. Those buggers are constantly scraping away at the lr.