Tropica Plant Nutrition is what it is called now. It is a Micro/Trace fert liquid.
I have used it as well as Flourish Comprehensive and CSM+B. In fact I just finished a large bottle of TPN. It has a lower Fe
level than Flourish and CSM+B which has lead me to dose more of it. I think I will switch back to Flourish Comprehensive when I finish my 2nd bottle of TPN.
My current preference order:
1) Flourish Comprehensive
2) Tropica Plant Nutrition
That said, I know Tom Barr prefers TPN - so there may be other compelling reasons for Tropica's product. Check out this link: