I must admit this has puzzled me for a few months (3) since setting up my planted tank.
I use Excel and Flourish trace for ferts. But surely you cannot go by the guide on the bottles for dosing as all Aquariums have different requirements depending on the type of plants quantity, amount of fauna, substrate etc. What I really want to know is, is my tank lightly, medium or heavily planted and how much should I up the dosing of the ferts if at all, I am currently dosing 5ml twice a week of trace and 10ml per day of excel. The plants are pretty healthy apart from that the growth seems to have slowed down. I do have a little bit of SHA but I don't mind, a little makes things look more natural IMO. I did have a massive Diatom break out (new tank) but that has now gone. Please have a look... oh the lighting is 2x40w t8s and 1x40w t5. I can add another t5 if needed. The tank is 240litres, substrate is Fluval Stratum, I do not dose co2. Any advice is more than welcome. Thanks.
I have 4 Rainbows, 6 Angels Since last week, 4 Danios, 1 Plec
Amazon Sword 3, Echinodorus Rose 3, Dwarf Hair Grass almost a carpet, Java Moss 3 lots, Java Fern loads, Anubias Bonsai 4, And Cryptocoryne Willisii (3 since last week), 1 Sag Flowering at the moment, 3 dwarf sags. and lots of bog wood.