Take the plastic kid pond, place it higher than your FT. Take some of your pump water an redirect it into the plastic kid pond using a series of splash down buckets. Then let the water return back to the FT though a non-firing bell siphon, using once again some type of splash down to help aerate your FT water.

No need to do water exchanges, once set up it's pretty much maintenance free. This plastic kid pond and also be used as a fry nursery, etc.