Here are some fertilizers that I recommend for a planted tank from reputable companies. Do have a look at how the type of fertilizer can affect your tank in this video:
https://youtu.be/SjE95TNQnSQ
This is a leaner version of APT-3. This would be used in low-tech tanks or for tanks with a high bio-load and low plant mass. Also, suitable for tanks that want to push for more red colouration in their plants.
My current fertilizer that I use. Works well for all types of aquascapes no matter the bio load or plant mass.
Great AIO fertilizer that utilizes the Estimative Index dosing system! Please do your weekly 50%+ water changes.
Shrimp safe AIO fertilizer.
AIO fertilizer made for Low-Tech aquariums. To my knowledge, this does not utilize the EI method.
Great overall fertilizer from the well known company, Tropica.
From the Tropica website: The fertilizer is particularly suitable where plants display a lack of nutrition. However, note that if algae growth starts, Specialised Nutrition will promote this growth.
Similar to APT 1 but from Tropica.
How To Use Guide:
https://tropica.com/en/plant-care/liquid-fertilisers/premium-nutrition
The base fertilizer supplement for the Seachem Flourish line up.
Contains elements not found in the basic Seachem Flourish fertilizer.