Hi all. I have problem... problem that has tormented me for some time now.
My set up is.
2 year old 29 gallon tank:
Amazon sword plants 4 of them
Anubias nana and some other anubias
Penguin 150 filter
130W of lighting (usually only 65w on)
Here is my problem. All my plants have little black spots on them after which a thin layer of... what looks like algae appears on the leafs prompting plants to look bad and stop growing.
New leafs come out... but as soon as they stop growing they are attacked by this unknown foe. It does not kill the plant.... but rather prohibits the growth.
It happened with my old plants ... when they succumbed I bought new plants and thinking that this might be aggressive algae growth, I reduced the hours of light to the plants from 10 to 8 .. When that did not help I reduced to 6 that did not help ether.. I was getting lots and lots of algae on the glass... Than I decided to give it 4 hours of light and ...my plants stopped growing but that thing on leafs remained. I do not add any iron or any other fertilizers to the tank. Only liquid co2. Could it be the intensity of the light? ( My lights had little feet to keep the fixture above the tank about 3 inch ) I had removed them and placed the light fixture directly on to the versa top to get more light to my plants. If you will need pictures I will gladly try to attach them here.
Anyone...? any one has any suggestion as to what it is and how to fight it?