Sorry to say but I gave up. After months of fighting bubbles I tore down my whole set up. I followed everyones suggestions finally my tank was so over run I quit. Didn't have the time, heart or capital to start over. All the suggestions failed. Crabs, low light, hand picking etc. All my lights filters pumps are in storage, 200+ pounds of rock drying in the sun out back. I miss the tank and the hobby but I don't think I can start over so thanks for all the advice and helpful info. I will continue to follow you guys and monitor the site.