I just saw this product @ Petsmart, it`s called lifegard customflo by pentair aquatics, i think it`s ideal for the planted tank & other flow problems, check out the link.
http://pentairaquatics.com/products/detail/custom_flo.htm
Regards
P.S. the starter kit is approx. 38.00 & the full kit approx. 90.00
Regards