redfishbluefish
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My Tank Thread
Try cleaning with vinegar and a scrub sponge. Even though it's months old, it might be the release agent/coating that was used during manufacture.
The other possibility is chloramine and your RO/DI isn't removing it. Do you have chlorinated water and did they recently change to chloramine?
The other possibility is chloramine and your RO/DI isn't removing it. Do you have chlorinated water and did they recently change to chloramine?