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					Originally Posted by neoh  I just picked up a second wp40 for my 77g long. One for random, one for wave. So far - I like it. I just wish it was stronger!   | 
	
 I have a 160 and on elisa after a few days there is no sand in the corner of my tank and you want two on a 70 gal . Your rocks are going to start falling over you must be bair bottem .