So do you have somewhat high nitrate phosphate too?Ca 470
Alk 12.5
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The glaze side is what I would be most worried about, but then it's all based on color, white tiles probably are titanium dioxide or something similar, green or blue tiles however those more likely than not have some sort of copper in them to give them that color. If you're really worried about them though a bench grinder or angle grinder on the glazed side to remove it, and just soak them in a bucket of tank water for a day or so.
And cover up those boss looking barcodes still on them? No way!I wonder if you could cement/epoxy aragonite sand to those.
Make it very natural looking.
not dying, it's just a very slow STN and i suspect its caused by moving it from one tank to another and different light upssets it. but it has been stopped. and no not a green slimeryour sps is dying... green slimer?
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