One more solution to consider, I use a IKEA watering can to water my house plants...
When I get biofilm, I use it to skim the surface bio film along with the poop filled, EI fertilized water and use it to water my house plants. It takes about three fills to water all my house plants and 90% of the bio film is gone.
The side benefit of recycling the nutrient rich water is my Indian Rope plant and a variety of other plants have flowered more than ever before.
It's a little less expensive than a skimmer or wave making apparatus. I sink enough $$$ into this hobby, a little side benefit can be nice