Today I was looking around at the SuperPet superstore here in town. The salesperson approached me and immediately tried to get me to purchase things. Most I already had. Ie: ammonia test kits, nitrite, nitrate, ph etc.....
She then proceeded to tell me that an IRON (Fe) test kit is essential when you have a planted tank. I've never had problems and my tank is healthy. All specs are normal.
What on earth is she talking about and do I really need such a thing?