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Some of the browning was indeed the outer leaves dying. The rest of it wasn't actually any dying at all, but rather diatoms growing at the highest points where the light is more intense. Thanks for the info!hobby5 said:Don't know about those vals. Normally the oldes (outer) leaves would die first. And they would start to die from the top. Sometimes there is a problem wit the leaves if they float on the surface and the light is to intense (hot), but your vals don't even reach the surface...
Why did you by a single female GBR? Imho a pair would have been much better.