Thanks for the link purrbox. It doesn't have a function for dry dosing, but as long as you put the same mL in your solution as you are going to dose (1 works), then it works and validates my math. I guess I could premix the stuff (I always get grains of something that won't dissolve in the mix)
IMO it is easier just to use the 65.3ppm of FE per L rule and do the math out on your tank if you are going to dry dose. Of course as I am doing the math, you probably want a tank around 100 gallons to achieve a reasonable measurement.
I am thinking of trying Tropica's Master Grow...
evercl92 - What are you trying to fix, change or avoid? You mention that you wonder if dosing more FE would help achieve better results, but you didn't mention what results you are not currently happy with. Do your plants look stunted?
Based on Purrbox's link, 1/2 tsp of CSM+B is roughly 2267mg. Then just do the math:
6.53% * 2267 = 148mg of FE you are dosing with each 1/2 tsp. So then convert you tank to liters... let's call your tank 140 gallons (taking out gravel, wood, ect). So 140g = 530l.
148/530 = .2792ppm that you are putting in your tank twice a week.
If your tests are correct and you have a level at or over 1.0, then depending on what you read, you are any where from 10x to 2x over the recommended level of FE in your tank.
The only thing to look at would be your plant uptake rate, in terms of how often and how much to dose. Isn't 1.0 the highest measurement on most FE test kits (or just mine)? If so, you may have a much higher level... ? I am not sure if there are new problems you find with excess FE, but if so, that may be part of the problem you are seeing... ?
A final thought. Based on what I have been gathering on planted tanks, limiting factors in plant growth are roughly in this order: lighting, CO2, NO3, PO4, Trace, K+ .... If you are seeing algae or plant growth problems you would need to deal with each barrier in order...
FWIW