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					Originally Posted by  fishoholic
					 
				 
				Did you wash the sand really really well? Old/used sand causes tank crashes due to the excess of nutrients it traps in it. If you didn't rinse it I would remove it all and rinse it out until the water runs clear. The sand will cause nitrate (and other) issues if not cleaned. When my boyfriend moved his tank 2 years ago he used a 1" layer of the old sand and it caused his whole tank to crash, he lost 2 rubbermaid containers full of sps, all his zoas and fish    
			
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  Humm okay umm I didn't was my sand oh boy..looks like I got a lot of work too do...when I pull rock out too trade with Denny ill pull out most if not all sand and rinse it really well...what do ido with my hermits snails and starfish tho...