If I remember correctly it was 1.5 months ago. I had been throwing away the trimmings from my main tank, and thought the shrimp would like it, so I tossed some in there. The other plants have been in there much longer. I was alarmed because both the Hornwort & the pothos I had in the back were looking sick.How long have you had the plants in there? I've seen hornwort turn pale and shed needles as some of it died off when it was new in the tank- reacting to the different conditions. The pic you show the green part looks healthy so maybe it is transitioning? Also I've noticed in my tank older parts of the stem just naturally die off- every week I trim off some and it just keeps growing on the other end.
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