Yes,lol, Oliver keeps me on the go. At 6:30am I was coming -back- from dropping him on the other side of town for the morning swim workout. The timer hasn't even turned on his tank lights when he leaves!
That's an excellent reaction to the water change and ammonia,baking soda recharge, definately sounds like progress. I'd hold out for 30 days before moving one of the mesh bags of ceramics.
Everybody's fertilizer situation is different, often based on location to begin with. There's the cheapest and best in many ways of ordering in dry powders and mixing up your own. I haven't done that yet but hope to before long. Then there's the UK lucky ducks who can just order up TPN+ and have more or less all their macros and micros taken care of in one fell swoop. Then there's the "black sheep nutritent," the troublemaker lol, good old carbon! By far the jewel in the crown dosing is carbon and getting it to the plants via CO2 has enormous advantages but is both expensive and difficult in some ways.
There are currently three broad categories of carbon delivery methods as far as I know. The first and best is via a pressurized tank with a bunch of gear that would make a scuba diver proud and will set you back anywhere from a couple hundred to almost a thousand. The second is roughly termed DIY carbon and is mostly various methods of fermenting sugar in bottles and attempting to deliver CO2 bubbles underwater as long as possible. Its a poor second to pressurized in the long run. The third method is what I do, liquid carbon.. its not as good as pressurized either as its not really CO2 but a complicated organic that's supposed to be an intermediate with C that the plant can use, but in practice its not as universally good and its expensive. In the USA the only liquid carbon I know of is Seachem Flourish Excel. In the UK they can't find that as easily I don't think but instead they have two choices in EasyCarbo and another that a LFS distributor makes I think. The excel makes a huge difference though.
Getting back to the non-carbon ferts, the best thing to understand from the outset is that its better to think of them in terms of the 17 or so elements of the periodic table that plants are composed of and, not surprisingly, need! They are divided into "macronutrients" and "micronutrients" based on a fairly major division in quantity of substance needed, there being three (Nitrogen, Phosphorus and Potassium, the famous "NPK" of gardening) that are like the "food" of plants. By contrast, the other dozen or so elements are needed in relatively tiny but necessary amounts and thus are like the "vitamins" that plants need, well I suppose "minerals" might be a better analogy to the human stuff, lol.
So what the game boils down to is a giant "matchup" of two long lists of nutrients and numbers. On the one side you're faced with some master lists of amounts/percentages needed for the tank (these are provided in documents here on TFF I believe, speaking off the top of my head this morning) and then on the other side you are faced with a bunch of random nutty numbers off the backs of plant food product bottles or web sites of the product. The products don't usually match well with what's needed (despite trumpeting till they're blue in the face that they do of course, just like the rest of our LFS experiences except maybe fish catching nets, lol!) So, does this make sense? What you often end up doing with bottle products is buying several and concocting little dosing amounts of each on different days in order to fabricate the correct fertilization of underwater plants.
Now, I personally, currently, subscribe to an attempt to roughly create a slight overdose of all the non-carbon nutrients during the week and then assume that my weekly water change pulls out the excess, at which point of course the nutrients will continue to come back in because I dose daily (different mixes on different days.) To answer your question, I currenty use 4 different bottles of Seachem Flourish, but this was because I happened to pick up a ton of them when a store was having a going out of business sale. They are divided into N, P, K individual bottles and then a "general" Flourish bottle that has all the micronutrients plus smaller amounts of the those same macronutrients. I do not necessarily recommend you try to copy me at all as I'm still a lousy beginner at plants and haven't even graduated into "planted tank kindergarden" yet,lol. (Although Oliver's swordplant -is- gorgeous and at least the set of plants we have now are alive and growing!)
The "actions" you take to do plants correctly can be very easy ultimately. In my opinion, having the knowledge to anticipate and do the right things for them is a skill that takes some time and attention. Definately a really cool part of the hobby!
~~waterdrop~~