In most cases saltwater should never be added to the system without a specific reason. Replace water removed by skimmer, a possible leak or spill, or when doing water changes. And it should be checked with a salinity device of some sort. Assuming you have no way to check the salinity and If none of these conditions above has occurred, it is safer to add RO/DI water.
why is the fish in the sump?Thanks everyone! I put a few liters of the filtered (RO I guess!) water from the tap he built. Attaching more images and the dashboard here. The red algae has been growing on the glass for a while but he ran out of time to clean it before he left on this Baja XL rally (where he has no service for the next 3 days) which was Tuesday. I only noticed because the loud pump this morning, which is better now with the water. I’ll make sure to keep adding water there, but let me know if any other recommendations or tweaks to keep this alive the next few daysThanks so much for the help and warm welcome!
