I got excited for this but I'd been using it for a while, it did nothing. My plants were dying off anyway and I wouldn't recommend this product, it stains things as well. I ended up switching to a different fertilizer that actually works.
I am very pleased with the customer service. This product works great. I have over 30 plant species in my 140-gallon tank and they love it.
It has really helped my plants flourish and grow. I have two planted Aquariums (no bigger than 20 gallons). The plants require low-medium care, so I am not sure how well this product will work with high maintenance plants. But it works well.