Plant troubles...

Its a 10 gallon with a ****load of plants in it and it has to 15 watt tropical sun 5500k lights shining on it.
 
what kind of plants. Swords need regular trimming of leaves that turn yellow, brown, thin, or see through Other paltns as well. Identify your plants that are problematic.
 
It sounds like they aren't getting enough nutrients or light. What substrate do you have? What ferts do you add?
 
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The one in the middle is the plant Im not quit sure what kind it is. As you can see to the right one of the leaves is becoming see through.
 
Before we go any further, take a pair of scissors and remove all the leaves that you can see through. They are dead.

How does the rest of the plant look?
 
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