help with live plant problem

[Craftsman]

I have a 75-gallon tank with seven different types of live plants, been in there for about a month. A few of them aren't doing great. I've got fluorite as the main substrate, topped with a layer of sand. I've been using Flourish tabs in the sub, following the instructions to the letter. My lighting setup is an LED light I picked up on eBay - it's specifically for live plants, but I'm not sure of the exact name. It's on for 11 hours a day. I'm wondering if my lighting is the issue here - the plants were doing fine at first, but now they're starting to turn brown and yellow.

[coltin]

From what you've described, it seems the plants are struggling to adapt to their new environment. The terrestrial leaves dying off is a common issue when transitioning from out-of-water growth to an aquarium setting.

To address the nutrient deficiency, I'd recommend using a liquid, iron-based fertiliser specifically designed for aquarium plants. It's essential to maintain an iron level of around 1ppm (1mg/L) for optimal growth. I've personally found success with Sera Florena, but there are other reliable brands available.