Plant Help

[LeviRH]

You really need to be a bit more specific about which plants have black roots. Some aquatics, like the Java fern family have black roots.

Yellowing in an aquatic plant could be a nutrient deficiency, a lighting deficiency or a co2 deficiency. They have slightly different requirements than terrestrials, so more info is really needed.


Education is the most powerful weapon we can use to change the world ~ Nelson Mandela

My assessment is based souly off the information provided.

Swords are the only plant I noticed in the picture, and they do well without CO2 supplementation, and also do well in lower to moderate light. Plus they're heavy root feeders - a very small amount of nutrients is absorbed through the water column(in this case) - gravel is not good for holding nutrients, and requires root tabs to help combat that at a minimum.

However, your post is on point and accurate. Could be any number of things, and more information would be required to give a more percise answer. :-)