Writing this after a bottle of red wine, so take it with a grain of salt, but I pretty much gave up on Seachem products. I never got Flourish to work for me, apart from the fact it is difficult to measure in smaller quantities, needs to be in the fridge, and the bottle always leaked it seemed. Seachem Prime smells like no other water conditioner. Does not "repair" slime coat. Easy Green line, no probs, super easy to dose, not leaking, no fridge, etc. Every other water conditioner does the same and more than Prime.