My trident ferns are turning brown from the centre out. Other plants in the tank are doing very well. I fertilise weekly, moderately high light, pH 6.5 carbonate hardness 0.
Any advise please?
I have a Fluval Roma with T8 lights 42". Has anyone swapped these tubes for retrofit LED lights? If so how did you go about it? I'm struggling to find the right size and the right light direction. Any help would be appreciated.