The other alternative is to have a well balanced soil and decent water source. Of course you can go that flush route in chems where you are constantly chasing your tail if you don't have things dialed. It is the solution for when things have already gone out of balance when this never needs to happen. Folks with well balanced soils don't have to adjust, feed or flush very much or at all. Given the poster is not going for the most aggressive growth, it may be worth mixing up some good notill or medium strength soil from a good local source, add a few amendments over the years and you will have so much buffering and availability of various nutrients that this issue would likely not come up. Once dialed, you yield will be similar, your quality will be higher, your costs will be lower, your effort will be minimal and you issues will go away. We can pass on some recipes if folks have not found them and are interested.