Wet/dry Filters and Plant tanks

>To: Aquatic-Plants at actwin_com
>From: schwartz at california_com (Guy Schwartz)
>Subject: Wet/dry Filters and Plant tanks
>I plan on purchasing a 100 gallon tank soon. I'm new to the hobby and have
been reading as much as possible
>about plants, hardware etc. I pan on having this new tank stocked with fish
and plants. My of my local fish 
>store owners claimed that a wet/dry filter was not the best thing for a
planted tank. Is this true?
>How much of a benefit are underground heaters?  One last question, is it
proper netiquette to e-mail someone
>or should all questions flow through this fourm. Thanks for your assistance.
>I messed up the address the first time