Quote Originally Posted by Ross
About xenia not tolerating higher temps, that is totally false in all my experience. My tank would reguarly get up to 86 and xenia grew like crazy.
Don't know about totally false. My tank got to 86 once and the xenia was the only casualty. It melted. So maybe you just has a resistant variant.

Xenia is an awesome pH indicator, one reason it doesnt ship well. Check your pH and make sure it is not fluctuating too much. HTH
This is another good point.