Nope. Both are in one tank. Taking out any fluid will without question include some black tank stuff, unless you have not used the head. 
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Computers manufactured by companies such as IBM, Compaq and millions of others are by far the most popular with about 70 million machines in use worldwide. Macintosh fans note that cockroaches are far more numerous than humans and that numbers alone do not denote a higher life form. -NY Times 11/91
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