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Hopefully someone can help me. I am newer to the dry ferts regime and decided to go to liquid dosing (using EI) on my 20g tank. I was doing dry 20-40g dosing:

KNO3 1/8 tsp 3x week
KH2P04 1/32 tsp 3x week
K2S04 1/32 tsp 3x week
then alternating days
CSM+B 1/32 tsp 3x week
FE (DPTA 11%) 1/64 3x week.

In playing with a calculator today: http://calc.petalphile.com
Here's what I get for dosing in a 250ml bottle using a 30ml (about an ounce):

KNO3: 3.5 tsp = 17.69ppm
KH2P04: 1/2 tsp = 2.51ppm
K2S04: 3.5 tsp = 15.93ppm
then alternating days (and solution)
CSM+B: 3/4 tsp - .33ppm
FE (DPTA 11%): 1/2 tsp = .34ppm

in looking at the two it appears that I was under dosing K2S04 and KN03 when I was dry dosing?

Am I looking at this correctly? Am I way off base?

I also to a 40/50% water change once a week with RO water as my GH is off the charts (i think due to the stone in the tank, Seiryu).

thank you for any input you can give me!

Duff
 
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