You can get an rodi system for $70 on Amazon thats easy to install. We installed ours in one of our showers and have used it 6 months now and just now replacing one filter. The tds always comes at 0. I can send you link if you likeLiving in New Hampshire there’s nothing I have to drive a minimum of one hour each way to get RODI water and decent but pricey corals/frags. Sucks. I have ordered online and had great luck and quality but hate to pay $40-$50 for shipping.