Water changes help lower nitrates, remove any unwanted chemicals/impurities, and make up lost trace elements. But if all those are good. Technically a water change wouldn't really benefit the tank right i imagine. If you're monitoring all parameters, and everything is in check; and your tank and corals looks good. is there any reason to do a water change?
This is assuming the tank isn't heavily stocked with SPSs and have a high demand for trace elements... but i imagine for lower nutrient systems, top offs can probably make up a lot of trace elements right?
This is assuming the tank isn't heavily stocked with SPSs and have a high demand for trace elements... but i imagine for lower nutrient systems, top offs can probably make up a lot of trace elements right?