I bought these Java Ferns several months ago when they looked fantastic in your tanks. Since I brought them home they look as you see them below. Some leaves turned completely light brown (then dark brown). Thinking the brown leaves are dead those I trimmed and removed.
Am not sure of the cause. Does anybody know? Currently I have standard fluorescent lighting that came with the hood. Tomorrow I am installing a Finnex FugeRay Planted+ I have.
Are these plants suffering from melt? How do I fix that?
Is it a deficiency of some sort? Something I read online has me wondering if it may be a Potassium deficiency.
Should also say that I have been using Seachem Flourish. Is it safe to use Flourish Excel or other forms of Flourish in my tank (I have Cardinal Tetras, Corydoras, Malaysian Trumpet Snails, and will be getting an Apistogramma cacatuoides from you soon.
I dose about 1-1.5ml worth once a week (the suggested dosage would be just over 2ml worth 1-2 times per week).
Additionally I dose 5ml of Fluval Sea calcium (it was recommended to me to do this for my inverts) once a week to help the snails properly form their shells.
Other than this there's no ferts (I know Calcium isn't technically a fert the way I use it) that I use.
It may or may not matter but I do use Prime when I do my weekly water change plus Vita-Chem and Garlic Guard. Vita-Chem is used during water changes and when I feed frozen foods. Garlic Guard is also used when I feed frozen foods.
Many thanks in advance for the help.
Below are some photos to help identify the problem.