Replaced Granular Ferric Oxide (1 cup GFO) and preformed partial water change (1.5 gal). Observe Hammer Coral still retracted and other Acropora corals have browned. Attribute Acropora browning to high nutrients. Still have an issue with flatworms but waiting for additional treatment with Flatworm Exit.

Related posts:

1. Water Change Doing a water change trying to get salinity up to 1.026 instead of 1.024. I thought it was an anomaly last time with the Tropic Marine Pro reading Mg at 1500 ppm but found same reading again this batch of...
2. Water Change (2 gal) Performed water change and some maintenance. Cleaned the Skimmer and pump. Realized airline supplying external air to skimmer pump was disconnected when working on tank last weekend. This is suspect to have influenced the lower than normal pH this week....
3. Water Change (3 gal), Maintenance, and New Equipment Completed a water change by vacuuming the chamber holding the closed loop pump, cleaned the closed loop pump, and installed a Micro Jet 320 to stir the chamber the Kalk drips into from the ATO....
4. Changed GFO and GAC Replaced Granular Ferric Oxide (GFO) and Granular Activated Carbon (GAC) and cleaned reactors. Used about 1 cup of GFO and 2 cups of GAC. Will need to cut down on GFO as took a big pH hit this time....
5. Changed GFO and GAC Replaced Granular Ferric Oxide (GFO) and Granular Activated Carbon (GAC) and cleaned reactors. Used about 1 cup of GFO and 2 cups of GAC....