What make the Pothos leaves wan? ...

How much is .3 of an acre?
Answers:    Two things. Over watering, and not enough hose. You have to numeral out what yours likes. They amendment their habits within the winter and summer, and you have to adjust how much,or how little they want. Water to be exact. Mine is now shifting it's mind, so I don't know what it likes very soon! Sounds silly ,but it is true. Byee
Weed Question?
Usually too much water. Overwatering can leach out the nutrients the plants soil.

What can you do to formulate them green again?

Use a fertilizer with a hight nitrogen content.
Usually the first number on the pouch of..fertilizer.

40-10-10 Would mean you own a high nitrogen fertilzier.