Can anyone tell me what's causing my Amazon swords to rot from the inside of the leaf like this? How do I fix it?
This is in a 55 gallon 5 month old tank. About 200 watts of light using several different spectrum bulbs. Water is 7.4-8 pH, dH about 11, kH about 5/6. Temp 78 degrees. Substrate is half aquasoil and half CaribSea EcoComplete.
There are about 12 Flourish tabs in the substrate. Up to about 2 weeks ago I had been dosing with flourish iron and flourish excel (one capful each once a week or so) and adding a capful of flourish liquid. I was also using Blackwater expert - 3 capfuls every week or so, when I did my 30% water changes. Had to medicate the tank and so I stopped dosing the plants so much, but these holes had been appearing before I stopped putting in all the extra plant food.
Thanks for your help!