So, I've seen systems set up a few ways and I'm curious about the thinking behind different mechanisms for pumping fresh salt water back into a tank during a water change. This is not referring to an ATO. Specifically, if you have a DIY WC system or you siphon water out manually to remove detritus, how are you returning the salt water to your system? Who has come up with something reliable and simple? Is there a good reason to use a $100+ dosing pump versus an inexpensive bottom drawing submersible?