So...the weekly dosing would look like this:
50% water change on Sunday
Nothing on Saturday
Sunday, Tuesday, Thursday
60ml on potassium nitrate
10ml Postassium sulfate
8ml Mono Postassium Phosphate
Monday, Wednesday, Friday
Everyday (except Saturday)
5ml Iron (I use the Iron Chelate from aquariumfertilizer.com)
Does anyone see any problems with this method. I also use all RO/DI water.
The plants never lie. Test kits do. Here's what I've found:
According to your fert concentrations and dosing, you are adding:
8ppm of N every other day (4ppm per day) - this is low. Plants that are growing well can use around 5-6ppm of N per day, sometimes more. Up your dosing to 60mL of solution every other day.
1.9ppm of P every other day - this is a little high, but workable. I think over time this may build up and possibly become a problem. Shoot for 6-8mL of your solution.
6.4ppm of K every other day - this is right on target. I think the problem you're seeing with the pinholes is because your plants aren't able to take up enough K because of your lack of N. When you increase your KNO3 dosing, you'll also up the K a little, which will still be on target.
I don't use CSM for traces, so I can't help you there. Generally, if the plants are solid shades of color with no washed out/pale colors, you have enough. I would however either does Iron daily, or on off days from your traces if you're using Seachem's Iron. It doesn't stay in the water column for long. If you're having any problems bringing out the colors (reds, oranges, etc), then you could easily double the amount of iron you're dosing, but I would go to daily dosing first.