Over the last month I've had a lot of my SPS corals start dying. I thought it was from switching over to my calcium reactor but that's been dialed in and working perfectly 7.8 dkh consistently. Then I thought it was my phosphates being 0 and nitrates at 10 but they have always been 0. But tonight I was trying to get some air out of my calcium reactor and I noticed this gel all around the bottom of my ph probe in my reactor. It looks like whatever is inside the ph probe is leaking into my tank. My tank was thriving great growth colouration and as soon as I put the reactor on stuff just started dying maybe it was this gel contaminating my water. I pulled it out and order a new one. Here is a pick of it I wiped most of it off before the picture.