So I am still learning about plants in the aquarium and would like some help
choosing the correct fertilizers for my 90 liter tank and keeping it relatively cheap.
I believe I have low/med lightning, and am running DIY CO2.
So from what I researched I understand that Macros (NPK) are the most important fertilizers for my plants, and most likely I would need to purchase 3 different fertilizers for each Macronutrient.
I am wondering though If I actually need Nitrogen as my tap water contains over 60ppm nitrate, and I have never been able to get this anywhere near to 20ppm, but have never had problems with my fish.
Also with Phosphorous would I need this as-well, as I read this can be gained from fish food and is naturally in the tank. I do have a lot of green algea on the back of my tank glass which I scrub of then it comes back 2 weeks later, so would this indicate I have a lot of Phosphorous, obviously I may need a test kit to check that....
So then I presume I would need to buy Potassium fertilizer.
Also for the Micronutrients I was thinking of just buying Seachem Flourish Tabs.
I don't know a great deal about all this stuff and only have done a little research, I would have no idea on dosages etc, but hope that would come with the product or can be found online..
So can anyone recommend me some good dry fertilizers that I can buy in the UK, as the only place I found was greenleafaquariums but they don't ship outside of the USA.
Also because my tank is low/med light do I even need to buy macro ferts? or would I better just sticking to micro's. Thanks for any help on this