I use AQ and still use a full dose of Ahhsome gel when purging. I really do not get much of any biofilm when purging anymore. I get a boat load of foam when purging, but who cares, it helps to carry anything that does come loose up to the surface so I can get rid of it.
When I add AQ weekly I keep my CH in the 300 range and I use less AQ then recommended (1 oz in a 350 gal tub) otherwise I get a lot of foaming. Using one ounce has kept my water clear, and reduced my CL demand, so it works for me. You need to play around until you find the sweet spot for your tub, water, and usage patterns.