mossonthemoon
Fish Crazy
If you have very strong light, and you keep them on for many hours a day then you will need to supplement, most likely. My sword was on its way out due to the hood breakage by the time I got my current tank, however I filled this (with two T5s) with plants mentioned above, and they were also fine without supplementation. Once I started keeping my lights on longer because I was being more careless (ie I had a newborn), they started to decline more and the leaves got weak. Even with high light, I think limiting the time on will help. I have never tested for iron, but Scotland's water is very soft, I have no nitrates, a low to neutral pH, never have any rusting or lime scale on anything, so I doubt they were getting high levels from water changes. Whatever they got was negligible. Everyone's experience will be different, but I would consider something like a sword a very easy plant, and since they are quite inexpensive I would see how it goes in your tank without supplementation, if you want.
