Black/brown spots on Utricularia longifolia

[robbevanrie]

Hey guys,

My Utricularia longifolia has had these spots since I bought it and now they seem to get slowly bigger. Is this black spot, rust spot or something else? And how can I treat it? Cut off the affected parts?

Thanks in advance!

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[Tanukimo]

It looks like just the older leaves dying off. It shouldn't be a problem as long as the newer leaves don't have it.