Originally Posted by blackwaterguy
Plants are seeming to be very difficult for me, well at least Amazon frogbit is. It just doesn't want to grow in may tank. I'm not ready to give up on trying plants though. I think after ready the profiles here that I might give water sprite a try.
I have poor results with Frogbit too. It goes through periods of growth (and even flowering once), then it suddenly dies off to two or three leaves--and this from having carpeted the tank surface in a 70g. After a few weeks, they begin to grow new leaves and spread. Then it all dies back a couple months later. Someone suggested it is because the tank is covered and the humidity is too high. I have hatchetfish and can't uncover. I am trying a couple leaves in two other tanks that are not so tightly sealed to see if this makes a difference. But this is not an easy plant for me, and others have had similar experiences.
Water Sprite is remarkable. I bought one plant in the mid 1990's and I am throwing out plants almost weekly. It takes time to settle in a new tank (doesn't like water parameter changes) but once it does, off it goes. It too goes through periods of rapid growth and periods of much slower growth, rest periods, natural for tropical species. But it never dies off like Frogbit.
Brazilian Pennywort is another easy plant. It can be planted as a normal stem plant, or it can be left floating. Here again, there are obvious rest periods, but this plant I also am chucking out regularly, and all from one spindly stem I found in a fish store 3 years ago. I now have it in five of my seven tanks.
A good liquid fertilizer once a week, like Flourish Comprehensive Supplement, is all these need.