Uh oh, there is no way I am doing 50% water changes I do 20% monthly and run almost Walstad by keeping a balance between bio and plant load.
I only dose Flourish, Iron, and Potassium, not sure what your take on those three are. I also dose Excel but I already know that only stays in the water column for a day.
Looks like Flourish and Potassium are a twice weekly thing, and looks like Iron is an every day thing but they skip days based on what your putting in with the iron. Flourish already contains traces of Iron so do you think it is okay to dose Flourish and Iron together once a week? Appears that Excel can be dosed with anything, except they cut it on the 7th day and I am wondering if that is due to the Prime?
What is your take on dosing these products in a borderline Walstad tank? If they are being consumed should I worry about them building in the water? My guess is that the nutrients are contained in some sort of a carrier oil of some sort and even though the nutrients are consumed the carrier oils are left behind in the tank??
Pertaining to EI and water changes, it's just a simpler way of maintaining the nutrient load in a tank without having to constantly test. You can dial it in over time, but I doubt to the point of only found 20% once a month. You may want to keep an eye on GH/KH and nitrates if only changing that little water.
The three ferts you dose do not interact with each other. The reason iron is not dosed on macro days is because it will cause the iron to precipitate.
Potassium can really be dosed whenever and won't hurt anything of you somewhat overdose. Excel does need to be dosed daily as it lasts 24 hours or so and only matters when light is on, and I'm not aware of anything it interacts with. They may have cut it in water change day because the directions are too dose more at water changes?
Flourish Comprehensive is a micro fertilizer which contains some iron. Both use ferrous gluconate which only lasts in the water column for about a day. Since you are not dosing full macros, I would do it like this (say first Sunday is water change day):
Sunday - Dose Potassium
Monday, Wednesday, and Friday morning - dose comprehensive
Tuesday, Thursday, and Saturday morning - dose iron
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