Just read your thread when you said your tap water is 10 ppm, I personally would not do daily water changes, I'm suggesting you may have to consider either buying a resin that can be put in your filter, or hob filter , or maybe live plants believe me plants do an amazing job of removing nitrate naturally, because plants utilize nitrate as a food source, and not only that fish enjoy it !!!
Some hobbyist like myself utilize a plant called Pothos, in which it could be placed in an hob filter or sump, we call this aquaponics. Research using the Pothos plant for reducing nitrate in freshwater aquariums. You will see how inventive people are when using the Pothos, and other nitrate removing plants. If you decide to go resin route specifically for removing nitrates, do research on the best product up to date.