I use spectra RO/DI, just replaced all the filters a couple months ago, i have a TDS meter and output reading is 0. Based on the thread from reefcentral some say not to do any water changes as the Dino thrives. At this point i don't have very much coral left so if using Metro only affects coral in the short term i'm fine with that. I made a decision not to purchase any coral since this started 6-7 months ago until i have the bacteria all cleared.
The steps for the water change is filling a 30 gallon tub and mixing the day of. I have used various types of salt, once mixed i transfer over to the tank on the same day. I checked the PO4(hanna) in the mixing tub and was registered at 0, i supposed i could try a different tub if the concern is leeching.
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