I have a 13" amazon sword in a one month old 55 gal tank with pea gravel substrate, two 18" T-5 9600k flourescents, ph at 6.8. I also have Anubias, Red ludwigia, Java fern and moss. The sword has put on five new leaves since I got it. My question is when the larger leaves get within 2 or 3 inches of the top of the tank they start developing brown spots. I dose with Flourish once per week. All the other plants are doing well and growing.
Glenn
Glenn