most people dont reccomend it because the roots get tangled in the plate of the UGF. That causes the filter to not function properly and you cannot transport you plants because the roots are intertwined with the filter. Most people either use a cannister filter with the spray bar or output set under the water to minimize surface agitation, or use a HOB power filter for the smaller tanks. Also, some people use internal filters, either the kind that use a sponge or an internal power filter.
aaron