Why are my inverts trying to get high in the tank?

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ThEfIShdude

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Hi just wondering if my inverts are trying to go high in the tank means I have a problem? Because I hadn’t calibrated my refractometer in a while and did it 2 nights ago. Before calibrated it was 1.025 and then I calibrated it with some of that premixed water that has a specific salinity and after I calibrated it it read 1.0275ish. I had noticed a decrease in health of all my corals and I lost almost all my inverts(8) and my Duncan especially was not doing well it almost died(I will show some picture). So I added about a gallon of distilled water and got it back to 1.025 and today I checked it again and it was 1.027 and so I added some more distilled to get it back down. I was wondering if that could have caused a emerald crab a type of snail from Africa and 6 snails and more are very weak. Could it have been that slow uprising of salinity or something like copper?
By the way my tank is a 29 gallon and other than the salinity my water chemistry is perfect.
Now onto the pics.
 
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ThEfIShdude

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How the tank used to look like

8B81BAC8-A093-44D6-96C4-5D73FCFB2066.jpeg 5BC836A3-C9AE-46AA-AAE2-226D17F406BE.jpeg
 
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dvgyfresh

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before I can help with anything need some more info, what are the actual parameters ? Possibly very high nitrate causing sluggish inverts / dying away or a contamination , and if your salt levels are jumping around that causes instability within all other parameters such as alk , cal and mg
 
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dvgyfresh

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I would stray from using API , they are notoriously misleading , but if those are yr actual parameters I don’t see why your inverts could be dying , maybe there isn’t enough surface agitation / flow to bring oxygen into the tank? I used to use api phosphate and it read anywhere from 2 - 3ppm after getting a Hanna checker it read .2 ppm, I only use api for PH / nitrate and it’s still a guess lol
 
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