"nntp.nildram.co.uk" wrote in message ...
i do have a problem with green algae but i have hermit crabs and turbo snails along with a yellow tang. I've been thinking of
adding a UV sterilizer to my system but would this starve the snails and crabs.
The tang is ok for other foods but the little hemits and snails seem to have no other source of food.

Robin

I'll second what George just said. Years ago, I bought a UV to get rid of algae. It had zero effect.
Save your money, and figure out where the algae is coming from. Usually either from feeding too
much, new tank syndrom, sunlight entering the tank, water issues - to name a few. All tanks have algae.
Maybe it's normal algae. You have to clean algae off your glass. That's normal