I agree with Dumme that overfert ruins any taste. There are people here that have constant tip burn on their plants, going to EC 2.4 in hydro and still complaining in growshop that they want another bottle to boost their buds ;). Some even like that chemical taste, i think they must be already hooked to phosphorus 
I believe that Dumme’s aquaponics with its lower concentrations can do really well and work without flushing. And technically it would be probably harder to manage flushing in aquaponics, cause you need some other plants to “draw” nutrients out of solution constantly (instead of the ones being flushed) otherwise you could harm the fish.