A simulated rainfall every other day? Unless the fish comes from a very wet part of the world, I can't imagine this would benefit the fish, but they are ultimately your fish to do with as you see fit. Just remember that you can keep the water too clean. Just like with humans, if an animal is kept in too sterile of an environment, it won't be able to build up a resistance to the little things that are always around.
As for me, I don't breed right now as I don't have the room. I would like to breed loaches one day. I get my stock from various places as I don't have a reliable aquatics store by me. I also have to quarantine because of this. All my tanks are planted. I don't use salt with softwater fish (which is the majority of my fish). I avoid medications where possible, but I am not averse to using them.