ya stays on the glass until i scrape it off but it just comes back again... what is excess silicates????Like a green film that covers your glass? Pretty much any type of snail and a good algae scraper will do.
Green diatom algae is a sign of excess silicates in your tank. Its pretty normal for a new tank. Eventually sponges will absorb the silicates and your diatom bloom will dissapate.