I can't write English, so I write using a translator. I'm sorry
These mangroves have been raised for more than a year, and since the last four months, yellow spots have formed on the leaves, and the leaves have dried up yellow, and they have started to fall one by one Faster than the growth rate of new leaves.
Water is FW and nitrate is under control.
I've also tried roottap sold by API, but I don't think it's working.
The lighting is 150w and according to the catalog specification, the ramen is about 660ppfd as shown in the picture (100 cm distance)
The flooring material is sand and it is about 30cm deep.
The temperature remains between 25 and 30 degrees.
There's almost no water flow.
The leaves that turn yellow and fall are giving me a hard time Please let me know the solution