On 2005-06-03, Paul A. Ergh wrote:
- 2 Fluval 304s (260 gph each) attached to 4 bio-wheel pros
- 2 powerheads rated at ~250gph each

That sounds like a lot of movement to me! I have just kept HOB filters
for years and never had a problem my plants. They move around plenty
just from the filter flow and from the fish swimming around.

Mostly, I try to keep them moving enough to the water doesn't stagnate
around the leaves - that tends to cause BGA growth. I'd try losing the
powerheads, if I were in your place.

--
Ross Vandegrift

"The good Christian should beware of mathematicians, and all those who
make empty prophecies. The danger already exists that the mathematicians
have made a covenant with the devil to darken the spirit and to confine
man in the bonds of Hell."
--St. Augustine, De Genesi ad Litteram, Book II, xviii, 37