My baby octo passed away two days ago and the reason seems to be the salinity. I tested all the water parameters and they're fine but my salinity seems to be off the chart(high). I have a hydromometer and the needle points to the very top. What could cause this? I buy pre mixed ro/di saltwater from a lfs and the salinity in their water is perfect. Maybe i got a bad batch? Is there a quick fix/easy way to bring the salinity down and keep it stable?