I do a daily water change at about 1% a day in less then 5 mins. I have a barrel down stairs that has new water in it and a drain on my sump. Its been running for 5 weeks and my Kh is up and the tank is starting to look good.
NH4 has dropped and I used to run Zeo, which worked great, but to much time for now. I might start usiing both together.
I don't think I would do a larger water change consistenly. It would probility take out the good to.
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120 G sps reef, looking to build bigger. 
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