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I'm actually not sure why I had the salinity that low. I believe I've always had it around the 1.023-1.024 numbers. I've got it back up to 1.025 as of now.
Update - I removed pumps yesterday and found two pumps not working - one small powerhead in the main tank, and one powerhead (which I though I actually shut off) in the sump. The one in the sump was connected to my uv sterilizer that quit working last year and I haven't replaced it yet. That pump actually shocked me pretty good when i removed it so I think I found my problem. I do have a grounding probe so I don't know if the stray voltage was an issue as I haven't gotten shocked in the actual tank, but once I removed it from the tank I got a good jolt which leads me to believe if voltage is getting out, then metal could be getting into the tank. I'm going to do a large water change today and hopefully start seeing an improvement. Thanks again.
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