Had a significant disaster tonight. So far I think all tank members are still alive. Will know better in the next few days how much damage was done.
Was wrapping up some pwc with the SW tanks. Did about a 1/3rd pwc with the 6.6G Edge Nano. Had 2 5G SW containers in the garage and still a couple gallons in the one in the storage closet. So figuring that I will get to use up the one in the in the closet and make room for the others I didn't bring in yet. I used it up.
Then after messing around with a few things. I got out the hydrometer - to make sure all was good.
By then I start seeing numerous dwarf Brittle Stars reaching all around, slightly differently than when they are looking for food - all arms extended coming out of hiding. Anemone is closed.
I find that the container of SW was NOT SW but RO water I guess because my water was WAY TOO low in salinity. New SW from the garage brought in immediately and checked good level. Then proceeded to do 2 50% and one ~70% pwc. To get it closer to the correct number.
I didn't have any Reef salt (used to but ran out) to fix it and it was late and no stores open. Usually buy prepared SW since the tanks are small. I got the level to just low normal. Finally. I was freaking out for a little while, and so was the tank.
In the mean time while I was fixing the water issue I moved about 6 Dwarf Brittle Stars to the other 2 tanks just in case the 6.6 crashes. The fish looks good now, has it's color back. DBS went back into hiding.
I haven't bought RO water for quite awhile and did not recall that to be RO. I think my heart almost stopped.
Very clean water now I suppose. During the pwc correction I used almost all my back up SW so I will be heading to the lfs Friday and in the mean time buying a container of reef salt to have on hand. AND make sure to double check all water BEFORE adding it to the tanks, everytime. Oh my that was a panic.